Detroit DD13 GHG14 (2014-16) Fault Code: SPN 3251 FMI 21 (ACM) Diesel Oxidation Catalyst Inlet/Outlet Pressure - Not Plausible

DESCRIPTION:
Diesel oxidation catalyst (DOC) inlet /outlet pressure not plausible.

MONITORED PARAMETER:
Exhaust pressure

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

PROBABLE CAUSES:
1. DOC inlet pressure sensor.
2. DPF outlet pressure sensor.
3. Check all electrical connections upstream of the ECM.
4. DOC pressure sensor tube plugged.
5. DOC pressure sensor elbow plugged.
6. Perform stationary regen.

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