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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> DTC P0127: Intake Air Temperature (IAT) Too High

DTC P0127: Intake Air Temperature (IAT) Too High

P0127 - INTAKE AIR TEMPERATURE (IAT) TOO HIGH

Description:  Indicates that the 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 exchangers
  • Low fluid level
  • Fluid leakage
  • Intercooler pump or relay failure
  • Crossed intercooler coolant lines
Diagnostic Aids:  Monitor the IAT2 PID. A typical IAT2 temperature should be greater than the IAT1 temperature. Refer to REFERENCE VALUES for ranges.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
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