P0181

DTC P0181: Fuel Temperature Sensor Circuit Range/Performance Problem

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

1. Turn the ignition switch ON (II).
2. Note the ambient temperature.
3. Check the IAT SENSOR in the DATA LIST with the HDS.
4. Compare the value of the IAT SENSOR and the ambient temperature.

Is the value of the IAT SENSOR and the ambient temperature same?

YES - Go to step 5.

NO - Allow the IAT SENSOR to cool to ambient temperature, then go to step 5.

5. Note the value of the FUEL TEMPERATURE SENSOR in the DATA LIST with the HDS.
6. Compare the value of the IAT SENSOR and the value of the FUEL TEMPERATURE SENSOR.

Does the value of the FUEL TEMPERATURE SENSOR differ 45 °F (25 °C) or more?

YES - Go to step 7.

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.

7. Replace the fuel temperature sensor.
8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure,
10. Allow the IAT SENSOR to cool to ambient temperature.
11. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
12. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0181 indicated?

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

NO - Go to step 13.

13. Monitor the OBD STATUS for DTC P0181 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 12, go to the indicated DTCs troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the fuel temperature sensor and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 10.