DESCRIPTION:Diesel Oxidation Catalyst (DOC) efficiency fault.
MONITORED PARAMETER:Exhaust temperature
TYPICAL ENABLING CONDITIONS:Always on
MONITOR SEQUENCE:None
EXECUTION FREQUENCY:Continuous when enabling conditions met.
TYPICAL DURATION:Two seconds
DASH LAMPS:1. MIL2. CEL
ENGINE REACTION:Derate 25%
VERIFICATION:Parked regen
NOTE: If any other codes are active, repair those first.
PROBABLE CAUSES:1. Inspect all wiring & connections upstream of the ACM: DOC outlet temperature, ATD harness 10-pin connector, VIH 47-pin connector, and ACM 120-pin connector.2. DOC outlet temperature sensor failure.3. DOC inlet temperature sensor failure.4. DPF outlet pressure sensor.5. DPF inlet pressure sensor.6. Wiring/connectors for sensors mentioned above.7. Check for the DPF being plugged/failed.8. Perform stationary regen.