WOMS
P code powertrain Medium severity

P0113 Intake Air Temperature Circuit High Input

The OBD2 code P0113 indicates that the engine control module (ECM) has detected a high voltage signal from the intake air temperature (IAT) sensor, suggesting a potential issue with the sensor or its circuit

Definition

The OBD2 code P0113 indicates that the engine control module (ECM) has detected a high voltage signal from the intake air temperature (IAT) sensor, suggesting a potential issue with the sensor or its circuit

Common causes

  • Faulty intake air temperature sensor
  • Open or shorted wiring in the intake air temperature circuit
  • Poor electrical connections or corroded connectors
  • Faulty engine control module (ECM)
  • Intake air temperature sensor harness damage
  • Incorrectly installed or damaged intake air temperature sensor
  • High resistance in the circuit due to damaged wires

Common misdiagnoses

  • Faulty Engine Coolant Temperature Sensor
  • Faulty Mass Air Flow Sensor
  • Vacuum Leaks
  • Faulty Engine Control Module (ECM)
  • Wiring Issues or Short Circuits
  • Faulty Intake Air Temperature Sensor
  • Air Filter Restrictions
  • Fuel System Issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can help identify if there are related issues

  2. 2. Inspect the IAT Sensor

    Locate the IAT sensor, which is usually found in the intake manifold or air intake duct

  3. 3. Check for physical damage, corrosion, or loose connections at the sensor

  4. 4. Check Wiring and Connectors

    Inspect the wiring harness and connectors leading to the IAT sensor for any signs of damage, fraying, or corrosion

  5. 5. Ensure that the connectors are securely attached and free of dirt or moisture

  6. 6. Test the IAT Sensor

    Use a multimeter to test the resistance of the IAT sensor. Compare the readings to the specifications provided in the vehicle’s service manual

  7. 7. If the resistance is outside the specified range, the sensor may be faulty and should be replaced

  8. 8. Check for Short Circuits

    Inspect the wiring for any short circuits to power or ground that could cause a high input signal

  9. 9. Use a multimeter to check for continuity and ensure that the circuit is functioning correctly

  10. 10. Inspect the Air Intake System

    Check for any obstructions or leaks in the air intake system that could affect the IAT sensor readings

  11. 11. Ensure that the air filter is clean and not clogged

  12. 12. Check Engine Coolant Temperature (ECT) Sensor

    Sometimes, a malfunctioning ECT sensor can affect the IAT readings. Test the ECT sensor to ensure it is functioning correctly

  13. 13. Clear Codes and Test Drive

    After performing repairs or replacements, clear the trouble codes using the OBD-II scanner

  14. 14. Take the vehicle for a test drive to see if the code returns

  15. 15. Consult a Professional

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician for further diagnosis.Additional Notes: - Always refer to the vehicle’s service manual for specific testing procedures and specifications. - Ensure that you take proper safety precautions when working on the vehicle’s electrical system. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P0113 code