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P codepowertrainMedium severity

P1435A/C Refrigerant Temperature Circuit Range/Performance

The OBD2 code P1435 indicates a problem with the A/C refrigerant temperature circuit, specifically that the temperature readings are outside the expected range or performance parameters

Definition

The OBD2 code P1435 indicates a problem with the A/C refrigerant temperature circuit, specifically that the temperature readings are outside the expected range or performance parameters

Common causes

  • Faulty A/C refrigerant temperature sensor
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Faulty A/C control module
  • Refrigerant overcharge or undercharge
  • A/C system leaks
  • Malfunctioning A/C compressor
  • Incorrect sensor calibration or installation

Common misdiagnoses

  • Faulty A/C compressor
  • Refrigerant leaks
  • Blocked or restricted A/C lines
  • Faulty A/C pressure switch
  • Electrical issues in the wiring harness
  • Malfunctioning A/C control module
  • Incorrect refrigerant charge
  • Faulty temperature sensor

Troubleshooting steps

  1. 1.Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  2. 2.Inspect the A/C System

  3. 3.Check the refrigerant level. Low refrigerant can affect the temperature readings and performance of the A/C system

  4. 4.Look for any signs of leaks in the A/C system, including hoses, connections, and the condenser

  5. 5.Examine the A/C Refrigerant Temperature Sensor

  6. 6.Locate the refrigerant temperature sensor and inspect its wiring and connectors for damage, corrosion, or loose connections

  7. 7.If the sensor appears damaged, it may need to be replaced

  8. 8.Test the Refrigerant Temperature Sensor

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

  10. 10.If the readings are outside the specified range, the sensor may be faulty and require replacement

  11. 11.Check the A/C Control Module

  12. 12.Inspect the A/C control module for any signs of damage or corrosion

  13. 13.Ensure that the module is receiving proper power and ground signals

  14. 14.Inspect Wiring and Connectors

  15. 15.Check the wiring harness and connectors related to the A/C system for any signs of wear, damage, or corrosion

  16. 16.Repair or replace any damaged wiring or connectors

  17. 17.Test the A/C System Operation

  18. 18.With the vehicle running, monitor the A/C system's performance. Ensure that the compressor engages and that the system is cooling properly

  19. 19.Use a scan tool to monitor the refrigerant temperature readings in real-time to see if they are within the expected range

  20. 20.Clear the Codes and Test Drive

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

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

  23. 23.Consult a Professional

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with A/C systems and OBD-II diagnostics. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P1435 code