Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3250 FMI 7 (ACM) Diesel Oxidation Catalyst Outlet Temperature Circuit Failed Low
NOTE: Please see the step by step troubleshooting procedures for this specific code.
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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