DESCRIPTION:
70°C (126°F) difference during non-regeneration mode.

MONITORED PARAMETER:
Diesel Oxidation Catalyst (DOC) Inlet Temperature vs. DOC Outlet Temperature.

TYPICAL ENABLING CONDITIONS:
Coolant temperature greater than 60°C (140°F), regen not active in last five minutes.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
One minute

DASH LAMPS:
1. CEL
2. MIL

ENGINE REACTION:
Regen Inhibit and 10% Engine Derate.

VERIFICATION:
Low Temperature Regen.

PROBABLE CAUSES:
1. DOC outlet temperature sensor harness/connector.
2. DOC outlet temperature sensor.