DTC P0127: Intake Air Temperature (IAT) Too High

P0127 - INTAKE AIR TEMPERATURE (IAT) TOO HIGH

Description: This DTC sets when the intake air temperature 2 (IAT2) sensor has detected a concern in the charge air cooler (CAC) system.
Possible Causes: Blockage of heat exchangers Low fluid level Fluid leakage CAC pump or relay failure Crossed CAC coolant lines
Diagnostic Aids: Monitor the IAT2 PID. A typical IAT2 temperature should be greater than the IAT temperature.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST DU .