C175 Tier 4 Final Engines for Off-Highway Trucks Caterpillar

Service Error ID's are displayed when the Cat^® Electronic Technician (ET) Service test has failed. The Service Error ID's are to help explain why the service has test failed. There could be cases when the service test error ID will isolate the failed component. If applicable use the appropriate troubleshooting procedure.

Table 1

Aftertreatment System Functional Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$0006	Aborted By User	The service test was canceled by the user.
$0009	Service Test Aborted By ECM	Check the service tool connection, do not abort the test before the test is complete. Repeat the test, if necessary.
$10A7	Coolant Temperature Too Low	Allow the engine to warmup.
$1010	Engine Stopped (No Engine RPM)	Start the engine.
$105F	Test Timed Out	Low temperature pop-up window not closed in time or DCU taking more time than is normally required to power on/off. Displays when the load is not high enough to raise the exhaust temperature.
$1169	Engine Exhaust Back Pressure Too Low	The SCR catalyst inlet pressure sensor may not be installed in the exhaust stream, or the exhaust piping is leaking, or is disconnected.
$11AA	Aftertreatment SCR Catalyst Reagent Temperature Too Low	The temperature of the DEF is too low. Operate the engine to raise the DEF Temperature.
$11A8	Aftertreatment SCR Catalyst Conversion Efficiency Too Low	Refer to Troubleshooting, NOx Conversion is Low.
$11A9	Aftertreatment Outlet NH3 Too High	Ammonia slip is happening. Cause could be poor quality DEF or engine running at high load conditions.
$11B5	Aftertreatment #1 NOx Level Sensors Not Ready	The NOx sensors have not reached the correct temperature to start reading the NOx Level. Perform an "Aftertreatment System Functional Test" to raise the exhaust temperatures.
$11B9	Aftertreatment #1 SCR Catalyst Intake Gas Temperature Too Low	The temperature of the exhaust system is not high enough to perform the test. Operate the engine to raise the exhaust temperatures. Restart the "Aftertreatment System Functional Test".
$11BB	Diesel Exhaust Fluid Level Too Low	The DEF tank level is too low to perform the test successfully. Add DEF to the tank.
$11BE	Ambient Air Temperature Too Low	Ambient temperature is below −45° C (−49° F). The Dosing Control Unit (DCO) cannot operate in these low ambient conditions.
$11C2	Aftertreatment SCR System in Warm-Up Mode	The DEF is not completely thawed.
$1126	Ground Speed Too High	Make sure that the equipment is stationary with the parking brake engaged.
$1218	Aftertreatment NOx Conversion Efficiency Detected on Incorrect Bank	Pump pressure lines between bank one and bank two are swapped.
$1219	Aftertreatment Diesel Exhaust Fluid Pump #1c Not Able to Prime	The first pump in the current bank is not in normal dosing mode after power cycle.
$121A	Aftertreatment Diesel Exhaust Fluid Pump #2c Not Able to Prime	The second pump in the current bank is not in normal dosing mode after power cycle.
$121B	Aftertreatment Diesel Exhaust Fluid Pumps Not Able to Prime	Both pumps in the current bank are not in normal dosing mode after power cycle.
$122A	Aftertreatment NOx Sensor(s) Installation Incorrect	NOx Sensors are swapped.
$FFFD	No Service Test Error	No error in the current bank.
Aftertreatment Dosing System Functional Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$0006	Aborted By User	The service test was canceled by the user.
$0009	Service Test Aborted By ECM	Check the service tool connection, do not abort the test before the test is complete. Repeat the test, if necessary.
$1011	Engine Running (Engine RPM Present)	The test cannot run with the engine running, turn the engine OFF.
$105B	Battery Voltage Too High	Inspect the charging system to determine the cause of the high voltage. Refer to Electrical Power Supply - Test.
$105F	Test Timed Out	Low temperature pop-up window not closed in time or DCU taking more time than is normally required to power on/off. Displays when the load is not high enough to raise the exhaust temperature.
$11AA	Aftertreatment SCR Catalyst Reagent Temperature Too Low	The temperature of the DEF is too low. Operate the engine to raise the DEF Temperature.
$11BB	Diesel Exhaust Fluid Level Too Low	The DEF tank level is too low to perform the test successfully. Add DEF to the tank.
$11C2	Aftertreatment SCR System in Warm-Up Mode	The DEF is not completely thawed.
$1219	Aftertreatment Diesel Exhaust Fluid Pump #1c Not Able to Prime	The first pump in the current bank is not in normal dosing mode after power cycle.
$121A	Aftertreatment Diesel Exhaust Fluid Pump #2c Not Able to Prime	The second pump in the current bank is not in normal dosing mode after power cycle.
$121B	Aftertreatment Diesel Exhaust Fluid Pumps Not Able to Prime	Both pumps in the current bank are not in normal dosing mode after power cycle.
$1229	SCR Inlet Temperature is Too High	SCR inlet temperature is too high. Wait for the exhaust to cool down after turning off the engine.
$FFFD	No Service Test Error	No error in the current bank.
Fuel System Functional Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$0009	Service Test Aborted By ECM	Check the service tool connection, do not abort the test before the test is complete. Repeat the test, if necessary.
$10A7	Coolant Temperature Too Low	Allow the engine to warmup.
$10C1	Primary Speed Timing Sensor Signal Not Responding	Refer to Troubleshooting, Speed/Timing - Test.
$10C2	Secondary Speed Timing Sensor Signal Not Responding	Refer to Troubleshooting, Speed/Timing - Test.
$10C3	Tertiary Speed Timing Sensor Signal Not Responding	Refer to Troubleshooting, Speed/Timing - Test.
$10C4	Fuel Rail Pressure Sensor Signal Not Responding	Refer to Troubleshooting, Sensor Signal (Analog, Active) - Test.
$10CB	Engine Load Too High	Fuel rate is too high for the test. Reduce load applied to the engine during the test.
$10D0	Engine Has Not Been Running Long Enough	Engine must be running during the test, start the engine before starting the test.
$10F5	Excessive Change in Engine Load	There was a change in the engine load while the test was running. Make sure that the engine load is constant while performing the test.
$10FB	Engine Speed Too Low	Engine Speed Too Low
$10FC	Engine Speed Too High	Engine Speed Too High
$103	Service Test Value Out of Range	Proper measurements were not accomplished. Retry the service test.
$105F	Test Timed Out	Service test timed out.
$108C	Coolant Temp Low	Coolant temperature must be great then 40° C (104° F).
$1108	Excessive Engine RPM Change	Do not allow engine RPM to fluctuate more than 100 RPM during test.
$1100	Fuel Rail Pressure Too High	The pressure in the fuel system must be released. Refer to Testing and Adjusting, Fuel Rail Pressure - Release for additional information.
$1101	Fuel Rail Pressure Too Low	This error ID indicates that the fuel rail pressure relief valve has failed. Refer to Troubleshooting, Fuel Flow is High.
$1117	Fuel Pressure Too Low	Refer to Troubleshooting, Fuel Pressure is Low.
$111D	Fuel Rail High Pressure Decay Too High	Refer to Troubleshooting, Fuel Flow is High. Refer to Test Step "Perform Fuel System Functional Test".
$111E	Fuel Rail Low pressure Decay Too High
$111F	Fuel Pump Flow Too Low
$1213	Engine Oil Pressure Too Low	The engine oil pressure is too low to perform the test. Refer to Troubleshooting, Oil Pressure Is Low.
Injector Solenoid - Test
$1100	Fuel Rail Pressure Too High	The pressure in the fuel system must be released. Refer to Testing and Adjusting, Fuel Rail Pressure - Release for additional information.
Aftertreatment #X DEF Dosing Injector #X Accuracy Test
N/A	Engine Speed Too High	The test cannot run with the engine running. Turn off the engine.
N/A	Catalyst Intake Temperature Too High	The system cannot run the test due to the SCR inlet temperature being too high. Allow the aftertreatment system to cool.
N/A	DEF Tank Temperature Too Low	The DEF tank temperature is too low to perform the test. Allow the system to heat up by running the engine, or performing an "Aftertreatment System Functional Test".
N/A	Diagnostic Codes Active	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
N/A	DEF Pressure Too High	The DEF pressure in the system is too high. Perform a "DEF Dosing System Purge Test" or shut down the engine and wait 2 minutes for the system to purge.
Aftertreatment #X DEF Dosing System #X Prime Test
N/A	Engine Speed Too High	The test cannot run with the engine running. Turn off the engine.
N/A	Catalyst Intake Temperature Too High	The system cannot run the test due to the SCR inlet temperature being too high. Allow the aftertreatment system to cool.
N/A	DEF Tank Temperature Too Low	The DEF tank temperature is too low to perform the test. Allow the system to heat up by running the engine, or performing an "Aftertreatment System Functional Test".
N/A	Diagnostic Codes Active	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
N/A	DEF Pressure Too High	The DEF pressure in the system is too high. Perform a "DEF Dosing System Purge Test" or shut down the engine and wait 2 minutes for the system to purge.
DEF Dosing System Purge Test
N/A	Engine Speed Too High	The test cannot run with the engine running. Turn off the engine.
N/A	Catalyst Intake Temperature Too High	The system cannot run the test due to the SCR inlet temperature being too high. Allow the aftertreatment system to cool.
N/A	DEF Tank Temperature Too Low	The DEF tank temperature is too low to perform the test. Allow the system to heat up by running the engine, or performing an "Aftertreatment System Functional Test".
N/A	Diagnostic Codes Active	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
N/A	DEF Pressure Too High	The DEF pressure in the system is too high. Perform a "DEF Dosing System Purge Test" or shut down the engine and wait 2 minutes for the system to purge.