P0134

DTC P0134: Rear A/F Sensor (Bank 1, Sensor 1) Heater System Malfunction

NOTE:
- If DTC P2251, P2237, P2240* and/or P2254* is stored at the same time as DTC P0134 and/or P0154*, troubleshoot DTC P2251, P2237, P2240* and/or P2254* first, then recheck for P0134 and/or P0154*.
- Information marked with an asterisk (*) applies to the front bank (Bank 2).

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle (in Park or neutral) without load until the radiator fan comes on.
4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0134 and/or P0154* indicated?

YES - Go to step 5.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay and the PCM.

5. Turn the ignition switch OFF.
6. Replace A/F sensor (Sensor 1).
7. Turn the ignition switch ON (II).
8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure.
10. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P0134 and/or P0154* is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Go to step 11.

11. Monitor the OBD STATUS for DTC P0134 and/or P0154* in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 10 and recheck.