DESCRIPTION:Injector cylinder #6 amplifier control valve abnormal operation (open). MONITORED PARAMETER:Injector cylinder #6 amplifier control valve. TYPICAL ENABLING CONDITIONS:Fis_nop_act greater than 1.85. MONITOR SEQUENCE:None EXECUTION FREQUENCY:Continuous when enabling conditions met. TYPICAL DURATION:Two seconds DASH LAMPS:1. MIL2. CEL ENGINE REACTION:Derate 25% VERIFICATION:Engine rpm 1400 – 1500: One minute. NOTE: If codes 168-xx or 723-xx active, fix those first. PROBABLE CAUSES:1. Inspect front fuel injector harness 14-pin connector.2. Front injector harness failure.3. Failed injector.4. Engine side harness failure.5. Failed MCM (Engine ECM).

DESCRIPTION:Injector cylinder #6 amplifier control valve, valve shorted circuit. MONITORED PARAMETER:Injector cylinder #6 amplifier control valve. TYPICAL ENABLING CONDITIONS:Fis_nop_act greater than 1.85. MONITOR SEQUENCE:None EXECUTION FREQUENCY:Continuous when enabling conditions met. TYPICAL DURATION:Two seconds DASH LAMPS:1. MIL2. CEL ENGINE REACTION:Derate 25% VERIFICATION:Engine rpm 1400 – 1500: One minute. NOTE: If codes 168-xx or 723-xx active, fix those first. PROBABLE CAUSES:1. Inspect front fuel injector harness 14-pin connector.2. Front injector harness failure.3. Failed injector.4. Engine side harness failure.5. Failed MCM (Engine ECM).

This diagnostic is typically one of the following:1. Diesel particulate filter regeneration inhibit switch message contains signal not valid indicator.2. Diesel particulate filter regeneration force switch message contains signal not valid indicator. NOTE: Please see the step by step troubleshooting procedures for this specific code. NOTE: If codes 168-0, 168-14, or 168-18 active fix those first. NOTE:If code 625-9 active, fix that first as well. NOTE: If ECM has been programmed recentely, check programming to ensure it is correct. NOTE: This code is coming from another computer on the vehicle (ABS, Transmission, etc…).

This diagnostic is typically one of the following:1. Diesel particulate filter regeneration inhibit switch message not received this ignition cycle.2. Diesel particulate filter regeneration force switch message not received this ignition cycle. NOTE: Please see the step by step troubleshooting procedures for this specific code. NOTE: If codes 168-0, 168-14, or 168-18 active fix those first. NOTE: If code 625-9 active, fix that first as well. NOTE: If ECM has been programmed recentely, check programming to ensure it is correct. NOTE: This code is coming from another computer on the vehicle (ABS, Transmission, etc…).

This diagnostic is typically one of the following:1. Diesel particulate filter regeneration inhibit switch message contains a data error indicator.2. Diesel particulate filter regeneration force switch message contains a data error indicator. NOTE: Please see the step by step troubleshooting procedures for this specific code. NOTE: If codes 168-0, 168-14, or 168-18 active fix those first. NOTE: If code 625-9 active, fix that first as well. NOTE: If ECM has been programmed recentely, check programming to ensure it is correct. NOTE: This code is coming from another computer on the vehicle (ABS, Transmission, etc…).