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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3250 FMI 15 (ACM) Diesel Oxidation Catalyst Outlet Temperature High

DESCRIPTION:
Exhaust temperature high.

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 regeneration

NOTE: If any other codes active, fix those first.

PROBABLE CAUSES:
1. Inspect the DOC outlet temperature sensor connector/harness.
2. Check connections upstream of the ECM (ATD harness 10-pin connector, VIH 31-pin connector, and MCM 120-pin connector).
3. DOC outlet temperature sensor.
4. Failed cylinder injector.
5. Inspect the DPF face for oil or coolant contamination – if present, find source.
6. Perform a parked regen.

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