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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3250 FMI 0 (ACM) Diesel Oxidation Catalyst Outlet Temperature Very High

DESCRIPTION:
This code sets when the diesel oxidation catalyst (DOC) outlet temperature is greater than 760°C (1400°F) for more than two seconds.

MONITORED PARAMETER:
Diesel oxidation catalyst temperature sensor.

TYPICAL ENABLING CONDITIONS:
Always on

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
25% Derate

VERIFICATION:
Parked regeneration

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

PROBABLE CAUSES:
1. DOC outlet temperature sensor harness/connector.
2. DOC outlet temperature sensor.
3. Failed fuel injector.
4. Remove the DPF and inspect for coolant or oil contamination. If found, find source of leak.
5. Perform a parked regen.
6. Electrical connections upstream of the ECM can also cause this code: ATD harness 10-pin connector, VIH 31-pin connector, and MCM 120-pin connector.
7. DPF inlet pressure sensor.
8. DPF inlet pressure sensor harness/connector.

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