DTC Troubleshooting

DTC Troubleshooting: P0183

DTC P0183: Fuel Temperature Sensor Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Reading and Clearing Diagnostic Trouble Codes

1. Turn the ignition switch to ON (II).

2. Check the FUEL TEMPERATURE SENSOR in the DATA LIST with the HDS.

Is about -40 °F (-40 °C) or less, or 4.92 V or more indicated?
YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the fuel temperature sensor and the PCM.


3. Turn the ignition switch to LOCK (0).

4. Disconnect the fuel temperature sensor 2P connector.

5. Connect fuel temperature sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.






6. Turn the ignition switch to ON (II).

7. Check the FUEL TEMPERATURE SENSOR in the DATA LIST with the HDS.

Is about -40 °F (-40 °C) or less, or 4.92 V or more indicated?
YES - Go to step 8.

NO - Go to step 20.


8. Turn the ignition switch to LOCK (0).

9. Remove the jumper wire from the fuel temperature sensor 2P connector.

10. Turn the ignition switch to ON (II).

11. Measure the voltage between fuel temperature sensor 2P connector terminal No. 2 and body ground.

Is there about 5 V?
YES - Go to step 12.

NO - Go to step 16.






12. Turn the ignition switch to LOCK (0).

13. Jump the SCS line with the HDS.

14. Disconnect PCM connector B (44P).

15. Check for continuity between fuel temperature sensor 2P connector terminal No. 1 and PCM connector terminal B33.

Is there continuity?
YES - Go to step 27.

NO - Repair open in the wire between the PCM (B33) and the fuel temperature sensor, then go to step 22.






16. Turn the ignition switch to LOCK (0).

17. Jump the SCS line with the HDS.

18. Disconnect PCM connector B (44P).

19. Check for continuity between fuel temperature sensor 2P connector terminal No. 2 and PCM connector terminal B5.

Is there continuity?
YES - Go to step 27.

NO - Repair open in the wire between the PCM (B5) and the fuel temperature sensor, then go to step 22.






20. Turn the ignition switch to LOCK (0).

21. Replace the fuel temperature sensor. Service and Repair

22. Reconnect all connectors.

23. Turn the ignition switch to ON (II).

24. Reset the PCM with the HDS.

25. Do the PCM idle learn procedure. ECM/PCM Idle Learn Procedure

26. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0183 indicated?
YES - Check for poor connections or loose terminals at the fuel temperature sensor and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.


27. Reconnect all connectors.

28. Update the PCM if it does not have the latest software, ECM/PCM Update or substitute a known-good PCM. Reading and Clearing Diagnostic Trouble Codes

29. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0183 indicated?
YES - Check for poor connections or loose terminals at the fuel temperature sensor and the PCM. If the PCM was updated, substitute a known-good PCM, Reading and Clearing Diagnostic Trouble Codes then recheck. If the PCM was substituted, go to step 1.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. Service and Repair If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.