Detroit DD16 EPA10 (2010-13) Fault Code: SPN 3251 FMI 2 (ACM) Diesel Oxidation Catalyst (DOC) Inlet Pressure – Not Plausible
DESCRIPTION:
This fault code sets when the pressure drop between the diesel oxidation catalyst (DOC) inlet pressure or diesel particulate filter (DPF) outlet pressure is not within an expected value.
MONITORED PARAMETER:
DOC inlet pressure sensor and DPF outlet pressure 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:
1. Drat 25%
2. EGR shut off
3. Regen inhibited
VERIFICATION:
Run engine between 1200 to 1800 rpm with a load less than 10%.
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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