P0127 – Intake Air Temperature Too High

P0127 – Intake Air Temperature Too High


Indicates that IAT2
sensor has detected a potential abnormality in the intercooler system. This condition will cause the boost from the supercharger to be bypassed to avoid potential engine damage.

Possible Causes

●● Blockage of heat
● Low fluid level
● Fluid leakage
● Intercooler pump or relay failure
● Crossed intercooler coolant lines

Diagnostic Aides

Monitor IAT2 PID. Typical
IAT2 temperature should be greater than IAT1. Refer to Section 6 , Reference Values for ranges.

Related Topics  P0119 - Engine Coolant Temperature (ECT) Sensor 1 Circuit Intermittent/Erratic

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