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P0113 — IAT sensor circuit — high input

The intake air temperature (IAT) sensor is reporting an abnormally high electrical signal. The ECM can no longer trim the air-fuel mix correctly for ambient temperature.

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Likely causes

  • IAT sensor failed or unplugged
  • Short in the harness between the sensor and the ECM
  • Connector oxidized or damaged by moisture and road salt

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Recommended checks

  1. 1

    Measure IAT sensor resistance and voltage

  2. 2

    Inspect the harness and connector for damage or corrosion

  3. 3

    Replace the IAT sensor if readings are out of spec

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Parts to replace