Detroit DD15 GHG14 (2014-16) Fault Code: SPN 1636 FMI 2 (MCM) Engine Air Temperature – Plausibility Fault Out of Range (Low Box)

DESCRIPTION:
Engine air temperature – plausibility fault out of range (low box).

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

TYPICAL ENABLING CONDITIONS:
1. Start with engine shut off.
2. Idle speed less than 900 rpm.
3. Coolant temperature greater than 65°C (149°F).
4. DPF zone 0.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Once per drive cycle.

TYPICAL DURATION:
20

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
1. Start with ignition shut off.
2. Start engine.
3. Warm up by driving vehicle so that coolant temperature greater than 65°C (149°F).
4. Let vehicle idle for greater than 5 min at less than 900 rpm.

NOTE: If there are codes present for EGR system, fix those first.

PROBABLE CAUSES:
1. Intake manifold temperature sensor.
2. Intake manifold temperature sensor harness.
3. Charge air outlet.