Detroit DD15 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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