Detroit DD13 EPA10 (2010-13) Fault Code: SPN 3242 FMI 20 (ACM) Diesel Oxidation Catalyst Temperature Drift – Inlet High or Outlet Low

DESCRIPTION:70°C (126°F) difference during non-regeneration mode.

MONITORED PARAMETER:Diesel oxidation catalyst (DOC) inlet temperature vs. DOC outlet temperature.

TYPICAL ENABLING CONDITIONS:1. Coolant temperature greater than 60°C (140°F).2. Regen not active in the last five minutes.

EXECUTION FREQUENCY:Continuous when enabling conditions met.

TYPICAL DURATION:One minute

DASH LAMPS:1. MIL2. CEL

ENGINE REACTION:Regen inhibit and 10% engine derate.

VERIFICATION:Low temperature regen.

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.

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Detroit DD13 EPA10 (2010-13) Fault Code: SPN 3242 FMI 3 (ACM) Diesel Oxidation Catalyst Inlet Temperature Sensor Circuit Failed High

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Detroit DD13 EPA10 (2010-13) Fault Code: SPN 3226 FMI 21 (ACM) NOx Outlet Sensor Drift High

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