Detroit DD15 GHG14 (2014-16) Fault Code: SPN 2630 FMI 2 (MCM) Engine Air Temperature Plausibility Fault Out of Range (High Box)

DESCRIPTION:
Engine Air Temperature – Plausibility fault out of range (High Box).

MONITORED PARAMETER:
Intake manifold and charge air cooler outlet temperature.

TYPICAL ENABLING CONDITIONS:
1. Engine speed 1100 to 1600 rpm.
2. Torque 500 to 1200 nm.
3. EGR mass flow greater than .1 kg/s.
4. Coolant temperature greater than 70°C.
5. Ambient temperature greater than -8°C (17.6 °F).
6. Barometric pressure greater than 755 mbar.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
10

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
Once engine is warmed up such that coolant temperature greater than 70°C (158°F) and ambient conditions are such that ambient temperature greater than -8°C (17.6°F) and barometric pressure greater than 755 mbar, run the vehicle with a light load on a flat highway.

PROBABLE CAUSES:
1. Air intake system faillure (charge air cooler leaks, intake piping).
2. Charge air outlet temperature sensor.
3. Charge air outlet temperature sensor harness/connector.

Note: If codes for EGR system active, fix those first.