C7.1 Engines Caterpillar

Service error identifiers are displayed when an electronic service tool service test has failed. The error identifiers help to explain the reason for the service test failure. There could be cases where the error identifier isolates the failed component. If applicable, use the appropriate troubleshooting procedure.

Table 1

Service Error Identifiers	Description	Troubleshooting
$0003	Another Service Test is Active	Only one service test may be active on a machine or engine at a time.
$0004	Service Test Active by Another ECM	Another service test from a different ECM is active. Either wait until the test is completed or abort the test to proceed.
$0005	Loss of Service Test Interlock	There is a communication issue between the ECM and the electronic service tool. There is too much data communicating across the data link. Disconnect any other data collecting tools.
$0006	Service Test Aborted by Tool/Monitor	Abort by user. Restart the test if desired.
$101A	Incorrect Throttle Position	The throttle is depressed or faulty. If the application contains a switched throttle, the switch may be faulty.
$101B	Shift Lever Not in Neutral	Shift the transmission lever to NEUTRAL.
$101C	Transmission Gear Incorrect	Shift the power train to NEUTRAL.
$1018	Parking Brake Not Engaged	Apply the parking brake.
$1109	Left Motor Rotation Direction Incorrect	The left drive motor velocity is greater than 0. The motor could be faulted or have a loss of communication on the datalink.
$110A	Right Motor Rotation Direction Incorrect	The right drive motor velocity is greater than 0. The motor could be faulted or have a loss of communication on the datalink.
$1180	Machine is Not Idle	Implements (or saws in forestry products) are actively in operation. Hydraulics are not locked out. Implement lockout solenoid is on "Hoist" and is not in float. AWD is installed and the AWD system is in "Creep" mode. Steering lockout is off. "OK To Elevate Speed" switch is OFF.
$1126	Ground Speed Too High	The machine is moving. Stop the machine to perform the service test.
$1012	Lever Not in Correct Position	Shift lever to neutral.
$110C	Brake Pedal Depressed	Release the brake.
$115C	Regeneration is Active	Wait for a DPF regeneration to complete or abort the test.
Wiggle Test
$1011	Engine running	Engine speed must be zero.
DPF Soot Loading Sensor Functional Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$1011	Engine Running	Engine speed must be zero.
$105F	Test Timed Out Not all conditions were met in order for the test to complete	Restart DPF Soot Loading Functional test.
$115B	Diesel Particulate Filter soot Loading Sensor Data incorrect	Contact the Dealer Solutions Network (DSN) as a soot sensor replacement is recommended.
Fuel Rail Pressure Relief Valve Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$1161	Fuel Temperature Too High	Fuel temperature must be above the threshold shown in the service tool and no active high fuel temperature events .
$10FB	Engine Speed Too Low	Engine speed must be higher than or equal to low idle speed.
$10FC	Engine Speed Too High	Engine speed must be lower than or equal to rated speed.
$10CB	Engine Load Too High	Delivered fuel volume must be less than the limit shown during the service tool test. An engine speed from the application is preventing the service test from taking control of the desired engine speed. Check that the machine is in a suitable operating mode before running the service test.
$1162	Fuel Leakage Detected	Contact the Dealer Solutions Network (DSN) if this fault repeatedly occurs when running the service test.
$1101	Fuel Rail Pressure Too Low	Refer to Troubleshooting, "Fuel Rail Pressure Problem".
$1100	Fuel Rail Pressure Too High	The pressure relief valve may have opened due to high rail pressure and is now regulating the rail pressure to be less than 80 MPa (11600 psi). The rail pressure may be controlling incorrectly to be too high. Refer to Troubleshooting, "Fuel Rail Pressure Problem".
$1118	Fuel Pressure Not Responding	Indicates that the rail pressure control is unstable during the service test. Contact the Dealer Solutions Network (DSN) if this fault occurs repeatedly when running the service test.
Fuel Rail Pressure Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure. Check that there are no electrical diagnostics on the fuel system-related sensors or actuators and no injector faults relating to injector trim codes.
$1161	Fuel Temperature Too High	Fuel temperature must be above the threshold shown in service tool and no high fuel temperature events are active.
$10FB	Engine Speed Too Low	Engine speed must be higher than or equal to low idle speed.
$10FC	Engine Speed Too High	Engine speed must be lower than or equal to rated speed.
$10CB	Engine Load Too High	Delivered fuel volume must be less than the limit shown during the service tool test. An engine speed from the application is preventing the service test from taking control of the desired engine speed. Check that the machine is in a suitable operating mode before running the service test.
$1162	Fuel Leakage Detected	Contact the Dealer Solutions Network (DSN) if this fault repeatedly occurs when running the service test.
$1101	Fuel Rail Pressure Too Low	Refer to Troubleshooting, "Fuel Rail Pressure Problem".
$1100	Fuel Rail Pressure Too High	The pressure relief valve may have opened due to high rail pressure and is now regulating the rail pressure to be less than 80 MPa (11600 psi). The rail pressure may be controlling incorrectly to be too high. Refer to Troubleshooting, "Fuel Rail Pressure Problem".
$1118	Fuel Pressure Not Responding	Indicates that the rail pressure control is unstable during the service test. Contact the Dealer Solutions Network (DSN) if this fault occurs repeatedly when running the service test.
Aftertreatment Regeneration System Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$10D0	Engine Has Not Been Running Long Enough	Allow engine to idle for 2 minutes and restart the Aftertreatment Regeneration System Test.
$1164	Engine Speed / Load Incorrect	Bring engine to idle and remove load and restart the Aftertreatment Regeneration System Test. The test will try to take control of engine speed to elevate idle to required position for duration of test.
$1169	Engine Exhaust Back Pressure Too Low	The observed exhaust back pressure when testing the EBPR is too low. Look for associated EBPR diagnostics. Look for exhaust system leaks. Run the Air System Motor Valves Verification Test to check correct operation of the EBPR.
$112C	Particulate Filter Intake Temperature Too Low	The system detects the DPF inlet temperature not being high enough to allow successful DPF desulfation. Refer to Troubleshooting, "Diesel Particulate Filter Intake Temperature Is Low". Check for exhaust leaks then restart the Aftertreatment Regeneration System Test.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	Bring engine to idle and remove load. The current operating load could be too high to allow the EGR valve to close. Look for associated EGR valve diagnostics. Run the Air System Motor Valves Verification Test to check correct operation of the EGR valve.
Air System Motor Valves Verification Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$1050	Battery Voltage Too High	For a 12 VDC system, the service test must only be executed if the battery voltage is between 9 VDC and 16 VDC. For a 24 VDC system, the service test must only be executed if the battery voltage is between 18 VDC and 32 VDC. Correct the system voltage and restart the Air System Motor Valves Verification Test.
$1070	Battery Voltage Too Low	For a 12 VDC system, the service test must only be executed if the battery voltage is between 9 VDC and 16 VDC. For a 24 VDC system, the service test must only be executed if the battery voltage is between 18 VDC and 32 VDC. Correct the system voltage and restart the Air System Motor Valves Verification Test.
$1164	Engine Speed/Load Incorrect	The test must be run with keyswitch ON only, Stop Engine leaving ECM powered and restart the Air System Motor Valves Verification Test.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	The test has verified that the valve is electrically OK, but the actuator is not responding to the desired test profile. Contact the Dealer Solutions Network (DSN) before proceeding.
$1170	Engine Exhaust Back Pressure Regulator Not Responding to Command	The test has verified that the valve has no electrical fault, but the actuator is not responding to the desired test profile. Contact the Dealer Solutions Network (DSN).
Aftertreatment System Functional Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$105F	Service Test Timed Out	Not all conditions were met for the test to complete. Restart the Aftertreatment System Functional Test.
$10CB	Engine Load Too High	Bring engine to idle and remove load. Current operating load is too high to allow the EGR valve to close and the EBPR to be used. Restart the Aftertreatment System Functional Test.
$10D0	Engine Has Not Been Running Long Enough	Allow engine to Idle for 2 minutes and restart the Aftertreatment System Functional test.
$10FB	Engine RPM Too Low	Lower the engine speed to idle. The test will attempt to take speed control to put engine in acceptable speed range. Restart the Aftertreatment System Functional Test.
$10FC	Engine RPM Too High	Lower the engine speed to idle. The test will attempt to take speed control to put engine in acceptable speed range. Restart the Aftertreatment System Functional Test.
$1121	Another Engine Speed Request Active	The test request to take speed control was denied by the application.
$112C	Particulate Filter Intake Temperature Too Low	The SCR system cannot dose due to the DPF inlet temperature not being high enough to allow DEF dosing to initiate. Check for exhaust leaks and restart the Aftertreatment System Functional Test.
$115C	Regeneration is Active	HC dosing is active. Allow desulfation to complete and then restart the Aftertreatment System Functional Test.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	Bring the engine to idle and remove load. The current operating load is too high to allow the EGR valve to close.
$11A8	Aftertreatment SCR Catalyst Conversion Efficiency Too Low	The SCR system NOx conversion is too low to perform the test. Refer to Troubleshooting, "NOx Conversion is Low".
$11A9	Aftertreatment Outlet NH3 Too High	There is too much NH3 in the exhaust. Perform the "Manual Hydrocarbon Dosing Capability Test" to raise the exhaust temperature and reduce the NH3 storage.
$11AA	Aftertreatment Diesel Exhaust Fluid Temperature Too Low	The temperature of the DEF is too low. Operate the engine to raise the DEF Temperature.
$11B5	Aftertreatment #1 NOx Level Sensors Not Ready	The NOx sensors have not reached the correct temperature to start reading the NOx level.
$11B9	Aftertreatment #1 SCR Catalyst Intake Gas Temperature Too Low	The SCR system cannot dose due to the SCR inlet temperature not being high enough to allow DEF dosing to initiate. Restart the Aftertreatment System Functional Test.
$11BB	Aftertreatment Diesel Exhaust Fluid Level Too Low	The DEF tank level is too low. Fill the DEF tank and restart the Aftertreatment System Functional Test.
$11C2	Aftertreatment SCR System in Warmup Mode	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.
$11C3	Aftertreatment SCR System Not Able to Prime	The SCR dosing system cannot prime. Refer to Troubleshooting, "DEF Pressure is Low".
Manual Hydrocarbon Dosing Capability Test
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$0009	Service Test Aborted by ECM	The engine may not be running in the correct thermal management mode. Contact the Dealer Solutions Network (DSN) for further assistance.
$1010	Engine Stopped (No Engine RPM)	Start the engine. The test will then progress.
$10D0	Engine Has Not Been Running Long Enough	Allow the engine to idle for 2 minutes and restart the Manual Hydrocarbon Dosing Capability Test
$1155	Diesel Particulate Filter Soot Loading Too High	DPF soot load is above an acceptable level for safe HC dosing. If soot load events are active, refer to the appropriate troubleshooting procedure.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	The NRS valve must have closed to allow HC dosing to start and/or the EBPR to elevate exhaust back pressure to increase exhaust temperature. Check for associated NRS valve diagnostic codes. Run the "Air System Motor Valves Verification Test" to check for correct operation of the NRS valve.
$1108	Excessive Engine RPM Change	The engine speed has changed significantly during the test which can affect the service test assessment capability. Rerun the test without changing engine speed.
$10F5	Excessive Change in Engine Load	The engine load has been changed significantly during the test which can affect the service test assessment capability. Rerun the test without changing engine load.
$11CA	Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency Too Low	The DOC may be sulfated. Perform the "Aftertreatment Recovery Procedure". If the "Manual Hydrocarbon Dosing Capability Test" continues to fail, the DOC may be aged so that not enough heat is being generated for the amount of HC dosing fuel being injected.
$11C0	Aftertreatment Diesel Oxidation Catalyst Intake Temperature Too Low	The DOC intake temperature is not reaching the target required by the test. Look for causes of excessive heat loss between the engine and the aftertreatment
$11BA	Aftertreatment SCR System Not Ready to Dose	The SCR system needs to dose a small amount of DEF during HC dosing. The DEF dosing is to protect the DEF injector tip from getting damaged at high temperature. The SCR system is not working properly. Check for associated SCR system diagnostic codes and follow relevant troubleshooting procedures.
$1169	Engine Exhaust Back Pressure Too Low	The observed exhaust back pressure when testing the EBPR is too low. Look for associated EBPR diagnostic codes. Check for exhaust system leaks. Run the "Air System Motor Valves Verification Test" to check the correct operation of the EBPR.
$11B9	Aftertreatment #1 SCR Catalyst Intake Gas Temperature Too Low	The HC dosing procedure is generating the correct heat rise. However, a significant amount of this heat is being lost before the exhaust gas reaches the SCR. Check for signs of exhaust leaks in the CEM between the DOC and the SCR.
High Pressure Fuel Pump Calibration
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure. Check that there are no electrical diagnostics on fuel system sensors or actuators, no injector faults relating to injector trim codes. One of the following sensor status is not OK: • Crankshaft speed/timing • Camshaft speed/timing • Coolant temperature • Fuel rail pressure • Fuel temperature There may be an electrical fault on an injector or the HP fuel pump. An injector trim may not be loaded or incorrect. One of the following events is active: • Pressure relief valve activation • Rail pressure event • Battery supply diagnostic is active
$10A7	Coolant Temperature Too Low	Coolant temperature is less than the trip point
$1072	Coolant Temperature Too High	Coolant temperature is greater than the trip point
$1160	Fuel Temperature Too Low	Fuel temperature must be within limits displayed during the test.
$1161	Fuel Temperature Too High	Fuel temperature must be within limits displayed during the test.
$1108	Excessive Engine RPM Change	Engine speed is not stable. Ensure that there is no cyclic loading from the application. Try running the test at a different engine speed or increase the load on the engine.
$1074	Engine RPM Too Low	Engine speed must be within limits displayed during the test.
$10FC	Engine RPM Too High	Engine speed must be within limits displayed during the test.
$1107	Engine Load Too Low	Fuel delivery must be within the limits displayed during the test.
$10CB	Engine Load Too High	Fuel delivery must be within the limits displayed during the test.
$1118	Fuel Pressure Not Responding	The rail pressure is unstable. Changing the engine operating condition may allow successful pump learn. If still unsuccessful, refer to Troubleshooting, Fuel Rail Pressure Problem.
$115F	Engine Load Incorrect	Changing the engine operating condition may allow successful pump learn. A lower engine speed and/or a lower load condition should be used.
$000A	Calibration Failure	Likely loss of communication between the ECM and the electronic service tool. Restart the electronic service tool and retry the calibration test.
$0003	Another Calibration is Active	Likely loss of communication between the ECM and the electronic service tool. Restart the electronic service tool and retry the calibration test.
$105F	Calibration Timed Out	Retry the "High Pressure Fuel Pump Calibration".
Aftertreatment Recovery Procedure
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$10D0	Engine Has Not Been Running Long Enough	Allow engine to idle for 2 minutes and restart the Aftertreatment Recovery Procedure.
$1010	Engine Stopped (No Engine RPM)	Start the engine. The test will then progress
$1155	Diesel Particulate Filter Soot Loading Too High	Observed DPF soot load is above an acceptable level for safe HC dosing and too high to allow procedure to regenerate soot within the DPF. Contact the Dealer Solutions Network (DSN) for further advice.
$11BA	Aftertreatment SCR System Not Ready to Dose	The SCR system needs to dose a small amount of DEF during HC dosing to protect the DEF injector tip from damage at high temperatures. The SCR system is not working properly. Identify associated SCR system diagnostic codes and follow relevant troubleshooting procedures.
$112C	Particulate Filter Intake Temperature Too Low	The system cannot dose due to the DPF Inlet temperature not being high enough to allow DEF dosing to initiate. Refer to Troubleshooting, "Diesel Particulate Filter Intake temperature Is Low". Check for exhaust leaks and then restart the Aftertreatment Recovery Procedure.
$10FB	Engine RPM Too Low	Lower the engine speed to idle. The test will try to take speed control to put engine in acceptable speed range. Restart the Aftertreatment Recovery Procedure.
$10FC	Engine RPM Too High	Lower the engine speed to idle. The test will try to take speed control to put engine in acceptable speed range. Restart the Aftertreatment Recovery Procedure.
$1173	Diesel Particulate Filter Regeneration Rate Too Low	The procedure is running in optimum conditions for DPF soot regeneration with no issues with Soot Sensor measurement. However, observed soot load is not reducing. Contact the Dealer Solutions Network (DSN) for further advice.
$10CB	Engine Load Too High	Bring engine to idle and remove load. The current operating load is too high to allow NRS valve to close and EBPR to operate. Restart the Aftertreatment Recovery Procedure.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	Bring engine to idle and remove load. The current operating load may be too high to allow the NRS valve to close. Identify associated NRS valve diagnostics. Run the "Air System Motor Valves Verification Test" to check correct operation of the NRS valve.
$11C0	Aftertreatment Diesel Oxidation Catalyst Intake Temperature Too Low	The DOC intake temperature is lower than required for the test. Identify causes of excessive heat loss between the engine and the aftertreatment.
$11C1	Aftertreatment Recovery Unsuccessful	The procedure has run in optimum engine conditions but has been unable to recover the Aftertreatment system. Contact the Dealer Solutions Network (DSN) for further advice.
$11B9	Aftertreatment SCR Catalyst Intake Gas Temperature Too Low	Although the procedure is generating the correct heat rise, some of this heat is being lost before the exhaust gas reaches the SCR. Check for evidence of exhaust leaks in the CEM between the DOC and the SCR.
Manual DPF Regeneration
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$10D0	Engine Has Not Been Running Long Enough	Allow engine to idle for 2 minutes and restart the Manual DPF Regeneration Procedure.
$112C	Particulate Filter Intake Temperature Too Low	The system detects the DPF inlet temperature is too low to allow successful DPF desulfation. Refer to Troubleshooting, "Diesel Particulate Filter Intake Temperature Is Low". Check for exhaust leaks and then restart the Manual DPF Regeneration Procedure.
$1164	Engine Speed / Load Incorrect	Bring the engine to idle and remove load and then restart the Manual DPF Regeneration Procedure. The test will try to take control of engine speed to elevate idle to required position for duration of test.
$1169	Engine Exhaust Back Pressure Too Low	The observed exhaust back pressure when testing the EBPR is too low. Look for associated EBPR diagnostics. Check for exhaust system leaks. Run the "Air System Motor Valves Verification Test" to check correct operation of the EBPR.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	Bring the engine to idle and remove load. The current operating load may be too high to allow the NRS valve to close. Check for associated NRS valve diagnostics. Run the "Air System Motor Valves Verification Test" to check correct operation of the EGR valve.
$1172	Diesel Particulate Filter Soot Loading Too Low	The soot level in the DPF is not high enough to warrant running a DPF regeneration. At low soot levels, the rate of regeneration is extremely slow, negating the value of the test.
$1173	Diesel Particulate Filter Regeneration Rate Too Low	The procedure is running in optimum conditions for DPF soot regeneration with no issues with soot sensor measurement. However, observed soot load is not reducing. Contact the Dealer Solutions Network (DSN) for further advice.
Aftertreatment Sulfation Recovery Procedure
$0002	Active Diagnostic Present	Resolve any active diagnostic codes. Refer to the appropriate troubleshooting procedure.
$10CB	Engine Load Too High	Bring the engine to idle and remove load. Current operating load is too high to allow the NRS valve to close and EBPR to operate. Restart the Aftertreatment Sulfation Recovery Procedure.
$10D0	Engine Has Not Been Running Long Enough	Allow the engine to idle for 2 minutes and then restart the Aftertreatment Sulfation Recovery Procedure.
$10FB	Engine RPM Too Low	Lower the engine speed to idle. The test will try to take speed control to put engine in acceptable speed range. Restart the Aftertreatment Sulfation Recovery Procedure.
$10FC	Engine RPM Too High	Lower the engine speed to idle. The test will try to take speed control to put engine in acceptable speed range. Restart the Aftertreatment Sulfation Recovery Procedure.
$112C	Particulate Filter Intake Temperature Too Low	The DPF inlet temperature is too low to allow successful DPF desulfation. Refer to Troubleshooting, "Diesel Particulate Filter Intake Temperature Is Low" and check for exhaust leaks. Restart the Aftertreatment Sulfation Recovery Procedure.
$1164	Engine Speed / Load Incorrect	Bring the engine to idle and remove load and then restart the Aftertreatment Sulfation Recovery Procedure. The test will try to take control of engine speed to elevate idle to required position for duration of test.
$1169	Engine Exhaust Back Pressure Too Low	The observed exhaust back pressure when testing the EBPR is too low. Identify any associated EBPR diagnostics. Check for exhaust system leaks. Run the "Air System Motor Valves Verification Test" to check correct operation of the EBPR.
$116F	Engine Exhaust Gas Recirculation Valve Not Responding to Command	Bring the engine to idle and remove load. The current operating load may be too high to allow the NRS valve to close. Check for associated NRS valve diagnostics. Run the "Air System Motor Valves Verification Test" to check correct operation of the NRS valve.