DESCRIPTION:
This fault code sets when the intake manifold pressure is lower than expected while the engine is under a load.

MONITORED PARAMETER:
Intake manifold pressure.

TYPICAL ENABLING CONDITIONS:
Engine coolant temperature greater than 65°C (149°F).

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
15 seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
None

VERIFICATION:
1. Engine coolant greater than 65°C (149°F).
2. Drive at steady highway speed with loaded trailer.
3. Engine rpm greater than 1130 for a minimum of five minutes.

PROBABLE CAUSES:
1. Failed inlet manifold pressure sensor.
2. Inlet manifold pressure sensor connector/harness.
3. Charge air cooler failure.