Detroit DD16 EPA07 (2007-09) Fault Code: SPN 2630 FMI 21 (MCM) Charge Air Outlet Temperature Drift (High Box)

NOTE: If codes for EGR system active, fix those first.

PROBABLE CAUSES:
1. Air intake system failure (charge air cooler leaks, intake piping).
2. Charge air outlet temperature sensor.
3. Charge air outlet temperature sensor harness/connector.