Event Codes
"Event Codes" alert the operator of any abnormal operating conditions on the machine, such as "low brake pressure" or "high coolant temperature".
When the ECM activates an event code, the operator is alerted by the Cat® Monitoring System. The active events will be logged by the ECM. The active event code can be reviewed by using the Cat® Monitoring System or the Cat® Electronic Technician (Cat® ET) Service Tool.
According to the severity of the abnormal system condition, one of 3 different "Warning Levels" is assigned to the "Event Code" by the ECM. Each warning level requires a specific response from the operator. The "Warning Levels" and the required operator responses are listed below.
In "Warning Level 1", the following condition occurs:
- An indicator illuminates or a gauge indicates in the RED zone.
Note: The indicator that illuminates or the gauge that is in the RED zone identifies the machine system that requires attention.
Warning Level 1 indicates operator awareness. Minor reductions in machine performance are detected.
In "Warning Level 2", all the following conditions occur:
- An indicator illuminates or a gauge indicates in the RED zone.
- The "Action" lamp flashes.
- A popup screen appears on the screen of the Advisor.
- Warning information appears on the display screen.
Note: Press the "OK" button to acknowledge any warning messages. Press the "OK" button to snooze the action lamp and the message on the display screen.
Warning Level 2 requires changing the operation of the machine or performing a maintenance procedure. Damage to components can occur.
In "Warning Level 2s", all the following conditions occur:
- An indicator illuminates or a gauge indicates in the RED zone.
- The "Action" lamp flashes.
- The alert from the action alarm pulsates.
- A popup screen appears on the screen of the Advisor.
- Warning information appears on the display screen.
Note: Press the "OK" button to acknowledge any warning messages. DO NOT press the "OK" button to snooze the action lamp and the message on the display screen.
Warning Level 2s requires an immediate change in operation, or an immediate maintenance action. Damage to components can occur.
In "Warning Level 3" .all the following conditions occur:
- An indicator illuminates or a gauge indicates in the RED zone.
- The "Action" lamp flashes.
- A sound from the "Action Alarm" pulsates.
- A popup message appears on the screen of the Advisor.
- Warning information appears on the display screen.
Note: Snooze is not available for "Warning Level 3".
A "Warning Level 3" requires an immediate safe shutdown of the machine to avoid damage to the machine or injury to personnel including the operator. The problem that caused the event must be corrected before machine operation can resume.
Indications and System Response
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| WARNINGS | |||||
|---|---|---|---|---|---|
| Warning Level | Warning Indications | Action That Is Required By The Operator | Possible Result
(1) |
||
| Warning Indicators | Action Indicator | Sounds Of The Action Alarm | |||
| 1 | ON | OFF | OFF | No immediate action is required. The system needs attention soon. | No harmful effects or damaging effects |
| 2 | ON | Flash ON and OFF. | OFF | Change machine operation or perform maintenance to the system. | Damage to system components |
| 2s | ON | ON | ON | Immediately change the machine operation. | Severe damage to system components |
| 3 | ON | Flash ON and OFF. | Pulse ON and OFF | Immediately perform a safe machine shutdown. | Injury
Component damage |
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| (1) | Possible result when the operator takes no action. |
Cat® Electronic Technician (Cat® ET) Service Tool
When an abnormal operating condition occurs, the status screen on the Operator Monitor or Cat® ET indicates that there is an active event.
Event codes are displayed on Cat® ET or the monitor in the following format:
EXXXX Description of the code
The "E" means that the code is an event code. The "XXXX" is a numeric identifier. The numeric identifier is followed by a description of the code.
Active event codes are listed in ascending numerical order. The code with the lowest number is listed first. The active event code is removed from the list when the condition is no longer present.
Some event codes are logged in the ECM memory. Some event codes are active only. The logged event codes are listed in chronological order. The most recent code is listed first.
A logged code is cleared from memory when one of the following conditions occur:
- The service technician manually clears the code.
- The code does not reoccur for 1000 hours.
- A new code is logged and there are already ten logged codes in memory. In this case, the oldest logged code is cleared.
Note: Always clear logged event codes after investigating and correcting the problem which generated the code.
Perform the following steps to troubleshoot an event:
- Obtain the following information from the operator monitor and the machine operator:
- The event and the time of the event.
- Determine the operating conditions for the engine at the time of the event. Conditions such as engine RPM and load may be important.
- Determine if there are any systems that were installed by the dealer or by the customer that could cause the event.
- Some of the events below can become active during normal system operation. Verify that the event is not due to error of the operator.
- Check all fluid levels and all oil levels.
- Troubleshoot and repair any active diagnostic codes.
The following table lists the event codes that apply to the brake control system of the machine. The recommended response is listed. Use the Cat® ET service tool to determine the event codes that are active or logged.
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| Brake System Event Identifier (EID) Codes | ||
|---|---|---|
| EID (Level) | Description | Possible Cause/Recommended Action |
| E0086 (2) | High Left Front Brake Oil Temperature | Possible Cause: Error code activates after engine runs for 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0086 (3) | High Left Front Brake Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Error code activates after engine runs for 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0087 (2) | High Right Front Brake Oil Temperature | Possible Cause: Error code activates after engine runs for 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0087 (3) | High Right Front Brake Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Error code activates after engine runs for 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0088 (2) | High Left Rear Brake Oil Temperature | Possible Cause: Error code activates after engine runs for 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0088 (3) | High Left Rear Brake Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Error code activates after engine runs for 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0089 (2) | High Right Rear Brake Oil Temperature | Possible Cause: Error code activates after the engine runs 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0089 (3) | High Right Rear Brake Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Error code activates after the engine runs 8 seconds AND brake temperature exceeds The fault deactivates when the temperature is below Recommended Action: Check for leaks in the cooling system of the brakes and check to see if the brake coolant is low. Repair any leaks that are discovered and add cooling fluid to the system, as needed. |
| E0090 (2) | High Differential (Axle) Oil Temperature | Possible Cause: This event is active when the following conditions are true:
1. The engine is running for more than 8 seconds. 2. The Differential Oil Temperature is greater than The event is deactivated when the oil temperature is less than Recommended Action: Change machine operation until event code is deactivated. Allow time for the oil to cool before operating the truck. |
| E0090 (3) | High Differential (Axle) Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: This Event is active when the following conditions are true: 1. The engine is running for more than 8 seconds. 2. The Differential Oil Temperature is greater than The Event is deactivated when the oil temperature is less than Recommended Action: Safely shut down machine until oil temperature is reduced. Allow time for the oil to cool before operating the truck. |
| E0528 (3) | Service Brake Accumulator Pressure Not Responding | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Either the front or rear service brake accumulator has not reached cutout pressure after 90 seconds of continuous charging command. The event will become inactive after the cutout pressure is obtained. Recommended Action: With the machine OFF, verify that the pressure sensors are not reading any pressure. Attach gauges to confirm that pressure sensors and gauges match each other. If gauges and sensors do not agree, replace faulty pressure sensors. |
| E0574 (2) | Park Brake Dragging | Possible Cause: Activates when all the following conditions are met:
Dragging Pressure is the minimum pressure that the machine needs to see to suppress wheel dragging. Dragging Pressure is not the same as Parking Brake Standby Pressure. 1. Parking Brake Solenoid Status is engaged. 2. Secondary Brake Pedal Position is less than Secondary Brake Position threshold (5%). 3. Park Brake Pressure is less than Dragging Pressure threshold is Recommended Action: Deactivates if ANYof the following conditions is met: 1. Parking Brake Solenoid status is in the OFF position. 2. Secondary Brake Pedal position is less than Secondary Brake Position threshold (5%). 3. Park Brake Pressure is less than Dragging Pressure threshold is There is no debounce time associated with this event. |
| E0582 (3) | Low Differential (Axle) Lube Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: The event is active when the following conditions are true: 1. The engine is running for more than 10 seconds. 2. The engine speed is greater than 1250 RPM. 3. The Differential Oil Temperature is greater than 4. The Differential Lube Pressure is less than Recommended Action: Check the level of the differential lube and add lube if low. Check the system for leaks. |
| E0645 (1) | Differential (Axle) Filter Plugged | Possible Cause: Differential Filter pressure is plugged for 20 seconds when the engine is running and differential oil temperature exceeds Recommended Action: Replace the filter. If condition occurs after filter replacement, check function of bypass valve. |
| E0645 (3) | Differential (Axle) Filter Plugged | Immediate Safe Shutdown Of Machine Is Required. Contact A Mechanic From The Service Shop. Possible Cause: Differential Filter pressure is plugged for 30 minutes when the engine is running and differential oil temperature exceeds Recommended Action: Replace the filter. If condition occurs after filter replacement, check function of bypass valve. |
| E0647 (1) | Right Brake Cooling Filter Plugged | Possible Cause: Brake Cooling filter is plugged.
Engine ran longer than 120 seconds after brake cooling oil exceeded Recommended Action: Replace the filter. If condition occurs after filter replacement, check function of bypass valve. |
| E0653 (2s) | Low Secondary Brake Accumulator Pressure | Possible Cause: Secondary Brake Accumulator pressure is lower than And parking brake has been released for machine operation before first charging cycle has completed. Recommended Action: Change operation to avoid damage to the machine. Check to see if both the primary and secondary accumulator pressures are dropping rapidly. If the pressures are dropping rapidly, replace the accumulator bleed down solenoid valve. Brake oil must be ISO 18/15 or better. |
| E0653 (3) | Low Secondary Brake Accumulator Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Secondary Brake Accumulator pressure has dropped below Recommended Action: Check to see if both the primary and secondary accumulator pressures are dropping rapidly. If the pressures are dropping rapidly, replace the accumulator bleed down solenoid valve. Brake oil must be ISO 18/15 or better. |
| E0660 (3) | Secondary Brake Accumulator Pressure Not Responding | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: A service brake accumulator has not reached cutout pressure after 90 seconds of continuous charging command. The event will deactivate once cutout pressure is obtained. Recommended Action: Check to see if both the primary and secondary accumulator pressures are dropping rapidly. If the pressures are dropping rapidly, replace the accumulator bleed down solenoid valve. Brake oil must be ISO 18/15 or better. |
| E0716 (3) | Conflicting Brake Pressure Information | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: This code activates under any of the following situations: 1. The secondary brake accumulator pressure is greater than the front brake accumulator pressure plus two times the sensor tolerance ( 2. The Secondary Brake Accumulator pressure is greater than the Rear Brake Accumulator pressure plus two times the sensor tolerance ( 3. The lowest of the three pressures have been greater than the cutout pressure minus the valve tolerance minus the sensor tolerance for 1 second and either of the other two pressures are greater than the cutout pressure plus two times the sensor tolerance for 1 second. Recommended Action: Use Cat® ET to monitor brake charge pressure readings. Identify the reading that is not reactive to the service brake pedal. Inspect the wiring of that sensor before replacing the component. If the readings from the brake system are inconclusive, inspect the sensors before replacing the components. |
| E0861 (1) | Clock Manual Alignment Required | Possible Cause: The ECM internal clock (electronic service hour meter) is too far out of alignment with the other control module clocks on the machine. Recommended Action: Use Cat® ET to synchronize the ECM hour meters. At the top menu, click "Service, and Synchronize Service Hour Meters" from the drop-down menu. Next, click the Synchronize button to synchronize all the service hour meters on the machine. A pop-up dialog box will inform you of a successful synchronization of each ECM. |
| E1004 (1) | Brake Oil Filter Plugged | Possible Cause: The Brake Oil Filter switch has reached Filter is plugged. Recommended Action: Replace the filter. |
| E1378 (2) | High ECM Power Input Voltage | Possible Cause: Event is active when system voltage is less than 18 VDC for more than 60 seconds. Recommended Action: The machine returns to normal operation when the voltage exceeds 18 VDC for longer than 2 seconds. |
| E1379 (2) | Low ECM Power Input Voltage | Possible Cause: Event is active when system voltage exceeds 32 VDC for more than 60 seconds. Recommended Action: The machine returns to normal operation when the voltage is less than 32 VDC for longer than 2 seconds. |
| E1443 (2) | Excessive Brake Pump Charge Cycling | Possible Cause: Activates when the engine is running and the brake charging rate is less than 7 seconds for 20 consecutive charges. Recommended Action: Use Cat® ET to check for event code E1004 - "Brake Oil Filter Plugged". Replace the filter. Shut off the engine to deactivate the event. If event code E1004 is not active, check for the following event codes: •E0528 - "Service Brake Accumulator Not Responding". •E0653 - "Low Secondary Brake Accumulator Pressure". |
| E1561 (2) | Low Brake Accumulator Pressure (OMC only) | Possible Cause: This event occurs at the time of start-up, during the first charging cycle after the key switch cycling.
The event warns the operator that machine movement should not occur until the initial accumulator charging has completed. Recommended Action: If the event code is active for longer than anticipated, review and address all event codes related to the accumulator. |
| E2124 (2s) | Low Front Brake Accumulator Pressure | Possible Cause: The "Front Brake Accumulator" pressure is low.
And the parking brake has been released for machine operation before the first charging cycle has completed. Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
| E2124 (3) | Low Front Brake Accumulator Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: The "Front Brake Accumulator" pressure is below Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
| E2125 (2s) | Low Rear Brake Accumulator Pressure | Possible Cause: The "Rear Brake Accumulator" pressure is low.
And the parking brake has been released for machine operation before the first charging cycle has completed. Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
| E2125 (3) | Low Rear Brake Accumulator Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: The "Rear Brake Accumulator" pressure is below Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
The following table lists the event codes that apply to the control system of the chassis. The recommended response is listed. Use the Cat ET service tool to determine the event codes that are active or logged.
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| Chassis System Event Identifier (EID) Codes | ||
|---|---|---|
| EID (Level) | Description | Possible Cause/Recommended Action |
| E0119 (1) | Low Fuel Level | Possible Cause: Activates when the fuel level is less than 15% for 120 seconds.
Deactivates if the fuel level is greater than 17% for 10 seconds. This event is active and logged. Recommended Action: Add fuel to the fuel tank. Refer to the OMM for the correct procedure. |
| E0119 (2s) | Low Fuel Level | Possible Cause: Activates when the fuel level is less than 10% for 120 seconds.
Deactivates if the fuel level is greater than 12% for 10 seconds. This event is active and logged. Recommended Action: Add fuel to the fuel tank. Refer to the OMM for the correct procedure. |
| E0541 (2) | Low Steering Accumulator Pressure | Do Not Move The Machine. Possible Cause: Activates if all the following conditions are met for 4 seconds: • The engine is running. • Actual gear is neutral. • "Steering Accumulator Pressure 1" or "Steering Accumulator Pressure 2" is less than Deactivates if any of the following conditions are met for 2 seconds. • The engine is not running. • Actual gear is not neutral. • Steering accumulator pressure is equal to or greater than This event is active only. Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
| E0541 (3) | Low Steering Accumulator Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Activates if all the following conditions are met for 2 seconds: • Machine movement is detected. • "Steering Accumulator Pressure 1" or "Steering Accumulator Pressure 2" is less than This event is active and logged. Deactivates if any of the following conditions met for 1.5 seconds. • Machine movement is not detected. • Steering accumulator pressure is Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
| E0542 (2) | Low Steering Pump Pressure | Do Not Move The Machine. Possible Cause: Activates if all the following conditions are met for 4 seconds: • The engine is running. • Steering pump oil pressure is less than This event is active and logged. Recommended Action: Deactivates if any of the following conditions are met for 2 seconds. • The engine is not running. • Steering pump oil pressure is |
| E0542 (3) | Low Steering Pump Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Activates if all the following conditions are met for 4 seconds: • Machine is in gear. • The engine is running. • Steering pump oil pressure is less than This event is active and logged. Recommended Action: Deactivates if any of the following conditions met for 2 seconds: • Machine movement is not detected. • The engine is not running. • Steering pump oil pressure is |
| E0543 (3) | High Steering Pump Pressure | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Steering Pump pressure exceeds The high-pressure cutoff for the steering pump is set too low or below the accumulator cut-out setting. Machine fail-safe on steering accumulator charging solenoid will place the pump at full displacement. Recommended Action: The Steering Pump high-pressure cutoff is set too low or below the accumulator cutoff setting. Refer to Testing and Adjusting , KENR8734, "Piston Pump (Steering) Pressure". A failed Pump Compensator solenoid. A disconnected Pump Compensator solenoid (warning in cab for this situation). Contaminated Pump Compensator - Internal damage to pump or pump compensator. Excessive System Leakage: Relief on steering valve set too low or stuck open. Accumulator Bleed Solenoid on steering valve stuck open or energized. Steering Pump failing and cannot build adequate pressure. Other system leakage - Hand Metering Unit (HMU), steering flow amp, etc. |
| E0617 (2) | Machine Lockout Active | Possible Cause: The purpose of the event code is to notify the operator that the machine is locked out.
The event activates when the status of the machine lockout is in the ON position. The event deactivates when the status of the machine lockout is in the OFF position. This event is active only. When this code is active, the following will occur: •The hoist system is locked out. • The transmission system is locked out. • The brake system is locked out. • The Lockout indicator, on the dash, is on. • The machine lockout lamp is on. • The steering system is disabled. Recommended Action: Block the wheels. Review the operator monitor for recommended actions, including possible maintenance, prior to starting the machine. |
| E0620 (2) | Starter Lockout Active | Possible Cause: The event activates when the status of the starter lockout is ON.
The event deactivates when the status of the starter lockout is OFF. This event is active only. When this code is active, the following will occur: • The starter is locked out. • The hoist system is locked out. • The transmission system is locked out. • The brake system is locked out. • The lockout indicator, on the dash, is on. • The machine lockout lamp is on. • The steering system is disabled. Recommended Action: Block the wheels. Review the operator monitor for recommended actions, including possible maintenance, prior to starting the machine. |
| E0621 (2) | Body Up | Possible Cause: Activates when the truck is put into gear while the body is in the raised position.
This event is active only. Recommended Action: Set the transmission to park or neutral. Lower the body. |
| E0663 (2) | Body Up While Moving | Possible Cause: Activates when the truck is in motion while the body is in the raised position.
This event is active and logged. Recommended Action: Bring the machine to a stop. Set the transmission to park or neutral. Lower the body. |
| E0665 (1) | Hydraulic Hoist Screen Filter Plugged | Possible Cause: Activates when all the following conditions are met:
• The engine has been running for 120 seconds. • The body up status is DOWN for 30 seconds. • Temperature of the right rear brake oil is equal to or greater than • The filter is being bypassed for 30 seconds. Deactivates if any of the following conditions are met for 60 seconds: • The engine has not run. • The body up status is UP . • Temperature of the right rear brake oil is • The filter is not being bypassed . This event is active and logged. Recommended Action: No immediate action is required. The system will need to be serviced soon. |
| E0680 (2) | Access Ladder Lowered With Transmission In Gear | Possible Cause: Activates when all the following conditions are met for 100 milliseconds:
• The engine is running. • The drivetrain is not in NEUTRAL or PARK. • The machine is not locked out. • The ladder is in the LOWERED position. Deactivates if any of the following conditions are met for 1000 milliseconds: • The engine is not running. • The drivetrain is in NEUTRAL or PARK position. • The machine is locked out. • The ladder is not in the LOWERED position. This event is active and logged. Recommended Action: Raise the ladder. |
| E0861 (1) | Clock Manual Alignment Required | Possible Cause: The ECM internal clock (electronic service hour meter) is too far out of alignment with the other control module clocks on the machine. Recommended Action: Use Cat® ET to synchronize the ECM hour meters. At the top menu, click "Service, and Synchronize Service Hour Meters" from the drop-down menu. Next, click the Synchronize button to synchronize all the service hour meters on the machine. A pop-up dialog box will inform you of a successful synchronization of each ECM. |
| E0875 (1) | Low System Voltage | Possible Cause: Activates when all the following conditions are met:
• The engine has been running for more than 30 seconds. • System voltage is less than 24.8 V for 15 seconds. • Engine speed is greater than 1500 rpm for 15 seconds. Deactivates if any of the following conditions are met for 15 seconds: • The engine has not run. • System voltage is greater than 24.5 V. All system voltage events are active and logged. Recommended Action: No immediate action is required. The system needs attention soon. To troubleshoot the charging system, refer to Troubleshooting, REHS0354. |
| E0875 (2) | Low System Voltage | Possible Cause: Activates when all the following conditions are met:
• The engine has been running for at least 30 seconds. • System voltage is less than 24.0 V for 30 seconds. Deactivates if any of the following conditions are met for 2 seconds: • The engine RPM is 0. • System voltage is greater than 24.5 V. All system voltage events are active and logged. Recommended Action: Change machine operation or perform maintenance to the system. To troubleshoot the charging system, refer to Troubleshooting, REHS0354. |
| E0875 (3) | Low System Voltage | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Activates if all the following conditions are met: • The engine has run for at least 60 seconds. • System voltage is less than 23.5 V for 10 seconds. Deactivates if any of the following conditions are met for 2 seconds: • The engine has not run. • System voltage is greater than 23.5 V. All system voltage events are active and logged. Recommended Action: To troubleshoot the charging system, refer to Troubleshooting, REHS0354. |
| E0876 (1) | High System Voltage | Possible Cause: Activates when all the following conditions are met:
• The engine has run for at least 120 seconds. • System voltage is greater than 29.5 V for 10 seconds. Deactivates if any of the following conditions are met for 2 seconds: • The engine has not run. • System voltage is less than 29 V for 10 seconds. All system voltage events are active and logged. Recommended Action: To troubleshoot the charging system, refer to Troubleshooting, REHS0354. |
| E0876 (3) | High System Voltage | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Activates if all the following conditions are met: • The engine has run for at least 10 seconds. • System voltage is greater than 32 V for 5 seconds. Deactivates if any of the following conditions are met for 2 seconds: • The engine RPM is 0. • System voltage is less than 32 V. All system voltage events are active and logged. Recommended Action: To troubleshoot the charging system, refer to Troubleshooting, REHS0354. |
| E1388 (1) | Operator Seat Belt Off While Not Idle | Possible Cause:
Activates if the following condition is met: • Operator seat belt is unfastened while machine is not in idle. Deactivates if the following condition is met: • The seat belt is fastened. • Machine is idle. Recommended Action: Fasten the seat belt. |
| E1403 (2) | Parking Brake off While Seat Belt off | Possible Cause: Activates if the following condition is met:
• Parking brake disengaged with seat belt unfastened. Deactivates if the following condition is met: • The parking brake is engaged. Recommended Action: Engage the parking brake. |
| E2142 (2) | High Steering Oil Temperature | Check Immediately, Service Required. Possible Cause: Activates if all the following conditions are met for 12 seconds: • Steering oil temperature is above Deactivates if the following condition is met: • Steering oil temperature is at or below This event is active and logged. Recommended Action: Idle at 1200 rpm in neutral. Perform maintenance to the system. |
| E2269 (2) | Low Steering Accumulator Pressure | Do Not Move The Machine Or Stop The Machine. Possible Cause: Active if ALL the following conditions are met for longer than 4 seconds: • The engine is running. • Actual gear is in the neutral position. • Pressure for the Steering Accumulator is less than Deactivates if any of the following conditions are met for 2 seconds: • The engine is not running. • Actual gear is not in the neutral position. • Pressure for the Steering Accumulator is greater than Recommended Action: Can be related to several components: • Priority Valve stuck, cut-in/cut-out valve not working properly. • Check Valve, just after Priority Valve, not closing. • Accumulators not holding pressure (seal leak/pre-charge issue). • Problem with pressure sensor and/or related wiring. Use Cat® ET to review diagnostic or event codes related to components identified above. (List may not be all inclusive depending on installed machine options.) |
Transmission ECM Event Code List
The following table lists the event codes that apply to the control system of the drivetrain. The recommended response is listed. Use the Cat® ET service tool to determine the event codes that are active or logged.
Show/hide table
| Transmission Event Identifier (EID) Codes | ||
|---|---|---|
| EID (Level) | Description | Possible Cause/Recommended Action |
| E0049 (2) | Coasting In Neutral Warning | Possible Cause: A warning to the operator that the machine is in neutral and the ground speed is above the threshold setting to activate the event code. Recommended Action: Reduce the output speed of the transmission to less than Apply the brake. |
| E0084 (2) | Machine Overspeed Warning | Possible Cause: Machine speed is greater than Recommended Action: Reduce engine speed. |
| E0108 (2) | Machine Upshift To Prevent Engine Overspeed | Possible Cause: Engine speed is too high for selected gear. Recommended Action: Upshift the transmission to prevent damage. |
| E0155 (2) | High Torque Converter Oil Temperature | Possible Cause: Activates when the engine is running and the Torque Converter output temperature is greater than Recommended Action: Deactivates when oil temperature falls below |
| E0155 (3) | High Torque Converter Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: Activates when the engine is running and the Torque Converter output temperature is greater than Recommended Action: Deactivates when oil temperature falls below |
| E0330 (3) | Transmission Output Speed Mismatch | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: The actual machine gear is second or higher with the lockup clutch engaged. Recommended Action: Disengage the lockup clutch (shifting will be disabled.) Perform speed sensor component test (inspect wiring harness, replace speed sensor). |
| E0531 (2) | Low Transmission Oil Level | Possible Cause: To activate this event, ALL of the following conditions must be met:
• Engine is running. • "Transmission Oil Level Switch" is low for greater than 15 seconds. To deactivate this event, ANY of the following conditions must be met: • Engine is running. • "Transmission Oil Level Switch" is OK for 50 seconds or longer. Recommended Action: With the engine off, check the level of the transmission oil. Ensure that the oil reservoir is filled before starting the truck. Refer to the Operation and Maintenance Manual, "Transmission Tank Oil Level - Check". |
| E0531 (3) | Low Transmission Oil Level | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: To activate this event, ALL of the following conditions must be met: • Engine is running for 5 seconds. • "Transmission Oil Level Switch" is low for greater than 15 seconds. To deactivate this event, ANY of the following conditions must be met: • Engine is not running. • "Transmission Oil Level Switch" is OK for 50 seconds or longer. Recommended Action: With the engine off, check the level of the transmission oil. Ensure that the oil reservoir is filled before starting the truck. Refer to the Operation and Maintenance Manual, "Transmission Tank Oil Level - Check". |
| E0736 (1) | Torque Converter Screen Filter Plugged | Possible Cause: To activate this event, ALL of the following conditions must be met:
• Engine is running for 120 seconds. • Oil temperature is higher than • Torque Converter is plugged for more than 30 seconds. To deactivate this event, the following condition must be met: • Torque Converter is not plugged for 60 seconds or longer. Recommended Action: Filter should be replaced soon. |
| E0762 (2) | Machine Driven With Cold Transmission | Possible Cause: To activate this event, ALL of the following conditions must be met:
• Actual Gear is equal to or greater than 1F. • Machine speed is greater than zero. • Transmission Oil Temperature is less than To deactivate this event, ANY of the following conditions must be met: • The actual gear setting is NEUTRAL or REVERSE. • Machine speed is 0 KPH. • Transmission Oil Temperature is less than Recommended Action: The gear limiting function is active until the temperature of the transmission fluid has warmed. |
| E0765 (2) | Transmission Charge Filter Plugged | Possible Cause: To activate this event, ALL of the following conditions must be met:
• Engine is running. • Transmission Oil is greater than Charge Filter pressure is too high. Recommended Action: Charge filter replacement required. |
| E0766 (2) | Torque Converter Filter Plugged | Possible Cause: To activate this event, ALL of the following conditions must be met:
• The engine has run for longer than 5 seconds. • Transmission Oil is greater than • Torque Converter Inlet Filter Bypass Switch is plugged for longer than 5 seconds. To deactivate this event, ANY of the following conditions must be met: • The engine is not running. • Torque Converter Oil Temperature is less than or equal to Recommended Action: Replace the "Torque Converter Filter" at the earliest opportunity. |
| E861 (1) | Clock Manual Alignment Required | Possible Cause: The ECM internal clock (electronic service hour meter) is too far out of alignment with the other control module clocks on the machine. Recommended Action: Use Cat® ET to synchronize the ECM hour meters. At the top menu, click "Service, and Synchronize Service Hour Meters" from the drop-down menu. Next, click the "Synchronize" button to synchronize all the service hour meters on the machine. A pop-up dialog box will inform you of a successful synchronization of each ECM. |
| E0877 (2) | High Transmission Oil Temperature | Possible Cause: To activate this event, ALL of the following conditions must be met:
• The engine has run for greater than 8 seconds. • Transmission Oil Temperature greater than To deactivate this event, ANY of the following conditions must be met: • Engine is not running. • Transmission Oil Temperature is less than Recommended Action: Use Cat® ET to check the machine for an internal component failure related to the transmission. This event code can also be the result of contamination (dirt). |
| E0877 (3) | High Transmission Oil Temperature | Immediate Safe Shutdown Of Machine Is Required. Possible Cause: To activate this event, ALL of the following conditions must be met: • Engine has run for more than 8 seconds. • Transmission Oil Temperature is greater than To deactivate this event, ANY of the following conditions must be met: • The engine is not running. • Transmission Oil Temperature is less than • Recommended Action: Use Cat® ET to check the machine for an internal component failure related to the transmission. This event code can also be the result of contamination (dirt). |
| E1327 (2) | High Engine Speed Shift | Possible Cause: The code can occur during shifts from NEUTRAL to REVERSE or NEUTRAL to FIRST or NEUTRAL to SECOND or REVERSE to NEUTRAL or FIRST to NEUTRAL.
If Engine Speed is above 1800 RPM during these shift requests. If the throttle is above 90%, then the event activates immediately. If the throttle is below 90%, and the Engine Speed does not drop below 1800 RPM for longer than 800 ms, the event is active. Recommended Action: Operate shift lever before applying throttle. |
| E2200 (2) | Torque Converter Lockup Clutch Slip Detected in Direct Drive | Possible Cause: This code is active as a result of a problem in the electrical circuit for the "Transmission Output Speed" sensor.
The modulating valve is not correctly calibrated or the valve is inoperative. Recommended Action: Check for an active diagnostic code associated with this event. |
| E2201 (2) | Transmission Slip Detected in First Gear Forward | Possible Cause: Pressure is low at "Clutch 1" or "Clutch 5" when the machine is operated in the FIRST SPEED FORWARD position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 1" or "Clutch 5" is inoperative. "Clutch 1" or "Clutch 5" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
| E2202 (2) | Transmission Slip Detected in Second Gear Forward | Possible Cause: Pressure is low at "Clutch 2" or "Clutch 5" when the machine is operated in the SECOND SPEED FORWARD position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 2" or "Clutch 5" is inoperative. "Clutch 2" or "Clutch 5" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
| E2203 (2) | Transmission Slip Detected in Third Gear Forward | Possible Cause: Pressure is low at "Clutch 1" or "Clutch 4" when the machine is operated in the THIRD SPEED FORWARD position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 1" or "Clutch 4" is inoperative. "Clutch 1" or "Clutch 4" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
| E2204 (2) | Transmission Slip Detected in Fourth Gear Forward | Possible Cause: Pressure is low at "Clutch 2" or "Clutch 4" when the machine is operated in the FOURTH SPEED FORWARD position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 2" or "Clutch 4" is inoperative. "Clutch 2" or "Clutch 4" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
| E2205 (2) | Transmission Slip Detected in Fifth Gear Forward | Possible Cause: Pressure is low at "Clutch 1" or "Clutch 3" when the machine is operated in the FIFTH SPEED FORWARD position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 1" or "Clutch 3" is inoperative. "Clutch 1" or "Clutch 3" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
| E2206 (2) | Transmission Slip Detected in Sixth Gear Forward | Possible Cause: Pressure is low at "Clutch 2" or "Clutch 3" when the machine is operated in the SIXTH SPEED FORWARD position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 2" or "Clutch 3" is inoperative. "Clutch 2" or "Clutch 3" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
| E2301 (2) | Transmission Slip Detected in First Gear Reverse | Possible Cause: Pressure is low at "Clutch 1" or "Clutch 6" when the machine is operated in the REVERSE position.
Leakage in the piston seals of the clutches. The modulating valve is not correctly calibrated or inoperative. "Clutch 1" or "Clutch 6" is inoperative. "Clutch 1" or "Clutch 6" components are worn or broken. Recommended Action: Check for an active diagnostic code associated with this event. A problem exists in the electrical circuit. |
Caterpillar Information System:
794 AC Off-Highway Truck Breather (Final Drive) - Replace
AP1055F Asphalt Paver Propel Systems Pressure Limiter Valve - Test and Adjust - Right Pump
794 AC Off-Highway Truck Braking System - Test
980M and 982M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Piston Pump (Implement) - Test and Adjust
794 AC Off-Highway Truck Battery or Battery Cable - Inspect/Replace
980M and 982M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Piston Pump Cutoff Pressure (Hydraulic Fan) - Test and Adjust
794 AC Off-Highway Truck Air Cooling Duct - Check/Clean - Outlet Screens
980M and 982M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Piston Pump Margin Pressure (Hydraulic Fan) - Test and Adjust
794 AC Off-Highway Truck Adapter Bearing (Blower Fan) - Lubricate
AP1055F Asphalt Paver Propel Systems Pressure Limiter Valve - Test and Adjust - Left Pump
980M and 982M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Hydraulic Fan Speed - Test and Adjust
980M and 982M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Modulating Valve (Transmission Clutch)
794 AC Off-Highway Truck Breather (Front Axle) - Replace
794 AC Off-Highway Truck Breather (Hoist and Brake Tank) - Replace
794 AC Off-Highway Truck Electric Cable - Check - High Voltage Harness
824K Wheel Dozer, 825K Soil Compactor and 826K Landfill Compactor Machine Systems Brake Control Valve (Parking)
824K Wheel Dozer, 825K Soil Compactor and 826K Landfill Compactor Machine Systems Parking Brake
CAT MT4400D AC Off-Highway Truck Machine Systems Solenoid Valve and Manifold (Blower Fan, Final Drive Lubrication, Steering) - Remove and Install
794 AC Off-Highway Truck Electrical Ground Stud - Inspect/Clean/Tighten
980M and 982M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Relief Valve - Test and Adjust - Steering Cylinder Work Port
CAT MT4400D AC Off-Highway Truck Machine Systems Steering Control Valve - Remove and Install
2014/05/07 New Rocker Arms Are Used on C27 and C32 Commercial Engines {1123}
794 AC Off-Highway Truck Final Drive Oil Filter - Replace
794 AC Off-Highway Truck Final Drive Oil Sample - Obtain