Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3250 FMI 20 (ACM) Diesel Oxidation Catalyst Temperature Drift – Inlet Low or Outlet High
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.
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