P0113 moderate

Intake Air Temperature Sensor 1 Circuit High Input

What does P0113 mean?

The P0113 code means the vehicle's onboard diagnostic system has detected: Intake Air Temperature Sensor 1 Circuit High Input. This is a moderate severity code.

Common Symptoms

  • Check Engine Light on
  • Engine may run lean
  • Possible hesitation
  • Slightly reduced power

Probable Causes (Ranked by Likelihood)

  • IAT sensor open circuit (no reading) Very High
  • Open signal wire between sensor and PCM High
  • Sensor connector unplugged Moderate
  • Failed sensor reading stuck at extreme hot temperature Moderate

Step-by-Step Diagnostic Procedure

  1. Check IAT voltage: above 4.7V at any temperature indicates an open circuit.

  2. Disconnect and reconnect the IAT sensor connector. If the code clears, the connector was loose.

  3. Check wiring continuity from sensor to PCM.

  4. Measure IAT sensor resistance and compare to temperature specification chart.

  5. Replace sensor if open internally.

Frequently Asked Questions

A high IAT input makes the ECU think it is very hot -- what does that do?

The ECU may reduce fuel delivery and retard ignition timing, thinking the intake air is extremely hot. This can cause slightly lean running and minor power reduction.

Explore More Codes

All codes | Browse by vehicle make