WOMS
P code powertrain High severity

P1185 FTS High - Fuel Pump Temperature Sensor High

The OBD2 code P1185 indicates that the fuel pump temperature sensor is reporting a high temperature reading, which may suggest a potential issue with the fuel pump or its cooling system

Definition

The OBD2 code P1185 indicates that the fuel pump temperature sensor is reporting a high temperature reading, which may suggest a potential issue with the fuel pump or its cooling system

Common causes

  • Faulty fuel pump temperature sensor
  • Wiring issues (shorts or open circuits)
  • Poor electrical connections
  • High fuel temperature due to overheating
  • Fuel pump malfunction
  • Engine control module (ECM) issues
  • Incorrect fuel type or quality

Common misdiagnoses

  • Fuel pump failure
  • Fuel pressure regulator issues
  • Wiring or connector problems
  • Engine control module (ECM) faults
  • Fuel temperature sensor malfunction
  • Fuel system leaks
  • Clogged fuel filter
  • Injector problems
  • Air intake issues
  • Vacuum leaks

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 Fuel Temperature Sensor

  3. 3. Locate the fuel temperature sensor and visually inspect it for any signs of damage, corrosion, or loose connections

  4. 4. Ensure that the wiring harness and connectors are secure and free from damage

  5. 5. Test the Fuel Temperature Sensor

  6. 6. Use a multimeter to measure the resistance of the fuel temperature 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 the Wiring and Connectors

  9. 9. Inspect the wiring leading to the fuel temperature sensor for any signs of wear, fraying, or short circuits

  10. 10. Ensure that all connectors are clean and securely connected

  11. 11. Check for Fuel System Issues

  12. 12. Inspect the fuel system for any issues that could cause overheating, such as a failing fuel pump or clogged fuel filter

  13. 13. Ensure that the fuel tank is not contaminated and that the fuel is at the proper level

  14. 14. Test the Engine Control Module (ECM)

  15. 15. If the sensor and wiring are in good condition, the issue may lie with the ECM. Check for any software updates or reprogramming that may be needed

  16. 16. In some cases, the ECM may need to be tested for proper operation

  17. 17. Clear the Codes and Test Drive

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

  19. 19. Take the vehicle for a test drive to see if the code returns. Monitor the fuel temperature readings if possible

  20. 20. Consult a Professional

  21. 21. If the issue persists after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P1185 code