WOMS
P code powertrain Medium severity

P0514 Intake Air Temperature Sensor 2 Circuit Malfunction

The OBD2 code P0514 indicates a malfunction in the circuit of the Intake Air Temperature Sensor 2, which measures the temperature of the air entering the engine

Definition

The OBD2 code P0514 indicates a malfunction in the circuit of the Intake Air Temperature Sensor 2, which measures the temperature of the air entering the engine

Common causes

  • Faulty intake air temperature sensor 2
  • Damaged wiring or connectors
  • Short circuit in the sensor circuit
  • Open circuit in the sensor circuit
  • Poor electrical connections
  • Corrosion at the sensor or connector
  • Faulty engine control module (ECM)

Common misdiagnoses

  • Faulty Intake Air Temperature Sensor 1
  • Faulty Engine Coolant Temperature Sensor
  • Air Filter Issues
  • Vacuum Leaks
  • Mass Air Flow Sensor Malfunction
  • Wiring or Connector Issues
  • Engine Control Module (ECM) Problems
  • Throttle Position Sensor Issues

Troubleshooting steps

  1. 1. Check the Vehicle's Service Manual

    Refer to the specific service manual for your vehicle to understand the IAT sensor's location, wiring diagrams, and specifications

  2. 2. Visual Inspection

    Inspect the IAT sensor and its wiring for any visible damage, such as frayed wires, corrosion, or loose connections

  3. 3. Check the connector for any signs of moisture or dirt that could affect the sensor's performance

  4. 4. Test the IAT Sensor

    Use a multimeter to measure the resistance of the IAT sensor. Compare the readings to the specifications provided in the service manual

  5. 5. If the resistance is out of range, the sensor may be faulty and should be replaced

  6. 6. Check the Circuit

    Inspect the wiring and connectors leading to the IAT sensor for continuity and proper voltage

  7. 7. Use a multimeter to check for voltage at the sensor connector with the ignition on (but the engine off). You should see a reference voltage (usually around 5 volts)

  8. 8. Check for Short Circuits or Open Circuits

    Use the multimeter to check for shorts to ground or open circuits in the wiring harness

  9. 9. If you find a short or open circuit, repair the wiring as necessary

  10. 10. Inspect the Engine Control Module (ECM)

    In some cases, the issue may be related to the ECM. Check for any software updates or known issues with the ECM that could affect the IAT sensor readings

  11. 11. Clear the Code and Test Drive

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

  12. 12. Take the vehicle for a test drive to see if the code returns. Monitor the IAT sensor readings with a scan tool to ensure they are within the expected range

  13. 13. Check for Other Codes

    If the P0514 code persists, check for any other related trouble codes that may provide additional insight into the problem

  14. 14. Professional Diagnosis

    If you are unable to resolve the issue after these steps, consider seeking help from a professional mechanic or technician who has experience with your vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P0514 code