Detroit DD13 EPA07 (2007-09) Fault Code: SPN 2631 FMI 4 (MCM, ACM) Intake Manifold Pressure Sensor Circuit Failed Low

NOTE: Please see the step by step troubleshooting procedures for this specific code.

PROBABLE CAUSES:
1. Wiring between manifold pressure/temperature sensor and ECM connector.
2. Intake manifold pressure/temperature sensor.