Exhaust Temperature Is High
Use this procedure in order to troubleshoot an occurrence of a high exhaust temperature or use this procedure if one of the following event codes is active.
Show/hide table
| Event Code | ||
|---|---|---|
| J1939 Code and Description | Conditions which Generate this Code | System Response |
| 2433-0
Engine Exhaust Exhaust Gas Temperature - Right Manifold : High - most severe (3) |
The manifold temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 2433-15
Engine Exhaust Exhaust Gas Temperature - Right Manifold : High - least severe (1) |
The manifold temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 2433-16
Engine Exhaust Exhaust Gas Temperature - Right Manifold : High - moderate severity (2) |
The manifold temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
Show/hide table
| Event Code | ||
|---|---|---|
| J1939 Code and Description | Conditions which Generate this Code | System Response |
| 2434-0
Engine Exhaust Exhaust Gas Temperature - Left Manifold : High - most severe (3) |
The manifold temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 2434-15
Engine Exhaust Exhaust Gas Temperature - Left Manifold : High - least severe (1) |
The manifold temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 2434-16
Engine Exhaust Exhaust Gas Temperature - Left Manifold : High - moderate severity (2) |
The manifold temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
Show/hide table
| Event Code | ||
|---|---|---|
| J1939 Code and Description | Conditions which Generate this Code | System Response |
| 1137-0
Engine Exhaust Gas Port 1 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1138-0
Engine Exhaust Gas Port 2 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1139-0
Engine Exhaust Gas Port 3 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1140-0
Engine Exhaust Gas Port 4 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1141-0
Engine Exhaust Gas Port 5 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1142-0
Engine Exhaust Gas Port 6 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1143-0
Engine Exhaust Gas Port 7 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1144-0
Engine Exhaust Gas Port 8 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1145-0
Engine Exhaust Gas Port 9 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1146-0
Engine Exhaust Gas Port 10 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1147-0
Engine Exhaust Gas Port 11 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1148-0
Engine Exhaust Gas Port 12 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1149-0
Engine Exhaust Gas Port 13 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1150-0
Engine Exhaust Gas Port 14 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1151-0
Engine Exhaust Gas Port 15 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 1152-0
Engine Exhaust Gas Port 16 Temperature : High - most severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
Show/hide table
| Event Code | ||
|---|---|---|
| J1939 Code and Description | Conditions which Generate this Code | System Response |
| 1137-15
Engine Exhaust Gas Port 1 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1138-15
Engine Exhaust Gas Port 2 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1139-15
Engine Exhaust Gas Port 3 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1140-15
Engine Exhaust Gas Port 4 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1141-15
Engine Exhaust Gas Port 5 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1142-15
Engine Exhaust Gas Port 6 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1143-15
Engine Exhaust Gas Port 7 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1144-15
Engine Exhaust Gas Port 8 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1145-15
Engine Exhaust Gas Port 9 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1146-15
Engine Exhaust Gas Port 10 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1147-15
Engine Exhaust Gas Port 11 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1148-15
Engine Exhaust Gas Port 12 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1149-15
Engine Exhaust Gas Port 13 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1150-15
Engine Exhaust Gas Port 14 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1151-15
Engine Exhaust Gas Port 15 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
| 1152-15
Engine Exhaust Gas Port 16 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time. | The code is logged. |
Show/hide table
| Event Code | ||
|---|---|---|
| J1939 Code and Description | Conditions which Generate this Code | System Response |
| 5686-0
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5687-0
Engine Exhaust Gas Port #2 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5688-0
Engine Exhaust Gas Port #3 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5689-0
Engine Exhaust Gas Port #4 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5690-0
Engine Exhaust Gas Port #5 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5691-0
Engine Exhaust Gas Port #6 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5692-0
Engine Exhaust Gas Port #7 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5693-0
Engine Exhaust Gas Port #8 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5694-0
Engine Exhaust Gas Port #9 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5695-0
Engine Exhaust Gas Port #10 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5696-0
Engine Exhaust Gas Port #11 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5697-0
Engine Exhaust Gas Port #12 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5698-0
Engine Exhaust Gas Port #13 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5699-0
Engine Exhaust Gas Port #14 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5700-0
Engine Exhaust Gas Port #15 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
| 5701-0
Engine Exhaust Gas Port #16 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged.
The engine is shut down. |
Show/hide table
| Event Code | ||
|---|---|---|
| J1939 Code and Description | Conditions which Generate this Code | System Response |
| 5686-15
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5687-15
Engine Exhaust Gas Port #2 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5688-15
Engine Exhaust Gas Port #3 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5689-15
Engine Exhaust Gas Port #4 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5690-15
Engine Exhaust Gas Port #5 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5691-15
Engine Exhaust Gas Port #6 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5692-15
Engine Exhaust Gas Port #7 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5693-15
Engine Exhaust Gas Port #8 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5694-15
Engine Exhaust Gas Port #9 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5695-15
Engine Exhaust Gas Port #10 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5696-15
Engine Exhaust Gas Port #11 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5697-15
Engine Exhaust Gas Port #12 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5698-15
Engine Exhaust Gas Port #13 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5699-15
Engine Exhaust Gas Port #14 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5700-15
Engine Exhaust Gas Port #15 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
| 5701-15
Engine Exhaust Gas Port #16 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all of the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time. | The code is logged. |
If the engine is shut down due to a high exhaust temperature, the power to the engine Electronic Control Module (ECM) must be cycled in order to restart the engine.
- Diagnostic codes and event codes
- Inlet air temperature is high
- Inlet air is restricted
- Engine overload
- Exhaust restriction
- Heavy buildup of deposits in the cylinder or internal oil leaks
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
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| Troubleshooting Test Step | Value | Result |
|---|---|---|
1. Check for Codes A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary. B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Determine if the diagnostic trouble code that directed to this procedure is present. D. Look for active diagnostic codes that are associated with the system for the event code that directed to this procedure. |
1137-0 through 1152-0 1137-15 through 1152-15 5686-0 through 5701-0 5686-15 through 5701-15 |
Result: An associated code is present. Repair: Troubleshoot any associated codes before continuing with this test. Result: A code is present for an exhaust port temperature. Proceed to the next step. Result: No active codes STOP |
2. Check for High Inlet Air Temperature Refer to Troubleshooting, "Inlet Air Temperature Is High". NOTE: A one degree increase in the inlet manifold temperature will increase the exhaust temperature by approximately three degrees. |
Temperature |
Result: The inlet air temperature is OK. Proceed to the next step. Result: The inlet air temperature is NOT OK. Repair: Determine the cause of the high inlet air temperature and correct the problem. If the problem is not resolved, proceed to the next step. |
3. Check for Inlet Air Restriction Refer to Troubleshooting, "Inlet Air Is Restricted". Note: Inlet air restriction can cause uneven exhaust port temperatures. For example, the cylinders at the front half of the engine may have exhaust port temperatures that are 10 to 20 °C (18 to 36 °F) higher than the exhaust port temperatures that are for the cylinders at the rear half of the engine. If this condition occurs, measure the inlet air restriction for each turbocharger. Make repairs in order to equalize the inlet air restriction for each of the turbochargers. |
Setting |
Result: The inlet air is not restricted. Proceed to the next step. Result: The inlet air is restricted. Repair: Determine the reason for high inlet air restriction and repair. If the problem is not resolved, proceed to the next step. |
4. Check for Engine Overload NOTE: When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel. |
Load |
Result: The engine is not being overloaded. Proceed to the next step. Result: The engine is being overloaded. Repair: Reduce engine load to an acceptable limit. If the problem is not resolved, proceed to the next step. |
5. Check for Exhaust Restriction NOTE: A restriction of the exhaust can cause high cylinder temperatures. A. Measure the exhaust restriction during engine operation with a load. For data that is specific to your engine, refer to the Technical Marketing Information (TMI). |
Restriction |
Result: The exhaust restriction measures OK. Proceed to the next step. Result: The exhaust restriction measurement is NOT OK. Repair: Determine the reason for high exhaust restriction and repair. If the problem is not resolved, proceed to the next step. |
6. Check for Heavy Buildup of Deposits in the Cylinder or Internal Oil Leaks A. Use a borescope to inspect the cylinders. Look for the following conditions: - Deposits on the valve seats - Deposits on the valve faces - Deposits on the cylinder walls that are above the upper limit of the piston stroke - Signs of internal oil leaks |
Deposits |
Result: The cylinder check is NOT OK. Repair: Determine the cause of the condition. Perform the necessary repairs. |
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