NOTE: The fault indicates that the High Idle Regen (HIR) was aborted due to the Diesel Oxidation Catalyst (DOC) inlet temperature not reaching the minimum of 270°C (518°F) to initiate dosing during an HIR .
DESCRIPTION:DOC inlet temperature out of range low.
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:MIL
ENGINE REACTION:None
VERIFICATION:Parked regen
NOTE: If any other codes are present, fix those first.
PROBABLE CAUSES:1. Intake throttle valve.2. Exhaust leaks.3. Intake manifold leaks.4. Intake air system leaks (Including charge air cooler).5. Jake brake operation.6. Thermostat.7. DOC inlet temperature sensor.8. DOC inlet temperature sesnor conncetor/harness.