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P code powertrain Medium severity

P0114 Intake Air Temperature Circuit Intermittent

The OBD2 code P0114 indicates that there is an intermittent issue with the intake air temperature sensor circuit, which may affect the engine's performance and fuel efficiency

Definition

The OBD2 code P0114 indicates that there is an intermittent issue with the intake air temperature sensor circuit, which may affect the engine's performance and fuel efficiency

Common causes

  • Faulty intake air temperature sensor
  • Poor electrical connections or wiring issues
  • Corroded or damaged connectors
  • Short circuit in the wiring
  • Open circuit in the wiring
  • Faulty engine control module (ECM)
  • Intermittent sensor signal
  • Vacuum leaks in the intake system

Common misdiagnoses

  • Faulty Mass Air Flow (MAF) Sensor
  • Faulty Engine Coolant Temperature (ECT) Sensor
  • Vacuum Leaks
  • Faulty Engine Control Module (ECM)
  • Wiring Issues or Short Circuits
  • Faulty Intake Air Temperature (IAT) 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 wear, fraying, or damage

  5. 5. Ensure that all connections are secure and free of corrosion

  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 out of range, the sensor may need to be replaced

  8. 8. Check for Air Leaks

    Inspect the intake system for any air leaks that could affect the IAT sensor readings. Look for cracks or loose fittings in the intake ducting

  9. 9. Inspect the Engine Coolant Temperature (ECT) Sensor

    Sometimes, issues with the ECT sensor can affect the IAT readings. Check the ECT sensor and its wiring for any faults

  10. 10. Check the ECM

    If all other components are functioning correctly, the issue may lie with the Engine Control Module itself. Check for any software updates or reprogramming that may be needed

  11. 11. Clear Codes and Test Drive

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

  12. 12. Take the vehicle for a test drive to see if the code reappears

  13. 13. Monitor Live Data

    Use a scan tool to monitor live data from the IAT sensor while the engine is running. Ensure that the readings are consistent and within expected ranges

  14. 14. Consult a Professional

    If the issue persists after performing these steps, it may be best to consult a professional mechanic for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P0114 code