Detroit DD15 EPA07 (2007-09) Fault Code: SPN 3242 FMI 8 (MCM) Motor Control Module Has Detected an Impossible Temperature Shift on the Diesel Oxidation Catalyst Inlet Temperature Sensor

NOTE: If 3242-3, 3242-4, 3242-8, 3250-3, 3250-4, or 3250-8 present, fix those first.

PROBABLE CAUSES:
1. Compare DOC inlet, DOC outlet, and DPF outlet. They should be within 45 degrees of each other.
2. DOC inlet temperature sensor.
3. DOC inlet temperature sensor connector/harness.
4. DOC outlet temperature sensor.
5. DOC outlet temperature sensor connector/harness.

Categories DD15 EPA07 (2007-09), Detroit, DTC TRUCKS Tags 09, 2007, 3242, 8, an, Catalyst, Code:, Control, DD15, Detected, Detroit, Diesel, EPA07, Fault, FMI, has, Impossible, Inlet, MCM, Module, Motor, On, oxidation, Sensor, Shift, SPN, Temperature, the

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