Detroit DD16 GHG14 (2014-16) Fault Code: SPN 2630 FMI 4 (MCM) Intake Air Temperature Circuit Failed Low

Posted by PerDiezel Solutions on April 28, 2026

NOTE: Repair the short to ground between pin 2 of the intake air temperature sensor harness connector and pin 119 of the motor control module (MCM) 120 – pin connector.

PROBABLE CAUSES:
1. Intake manifold air temperature sensor failure.
2. Intake manifold air temperature sensor harness/connector (Ping 2 of the intake air temperature harness connector and pin 119 of the 120 pin ECM connector).

WARNING!