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P0112

IAT Sensor circuit high voltage (low air temperature)

IAT Sensor circuit high voltage (low air temperature)

Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2 · Default action: ECM Default: –Default value of 25 °C (77 °F) used

Common causes

  • IAT Sensor to ECM wiring: open circuit or high resistance IAT Sensor to ECM sensing circuit: short circuit to B+ voltage IAT Sensor failure

Quick checks

  • Confirm freeze-frame and conditions when the code set
  • Inspect connectors, grounds, and harness for the circuit named in the code
  • Compare live sensor values vs expected (unplugged/biased sensors are common)

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