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.
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 2631 FMI 3 (MCM, ACM) Intake Manifold Pressure Sensor Circuit Failed High
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