DTC P0134: A/F Sensor (Sensor 1) Heater System Malfunction
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
- If DTC P0135 is stored at the same time as DTC P0134, troubleshoot DTC P0135 first, then recheck for DTC P0134.
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS.
- Start the engine, and let it idle without load (A/T in P or N, M/T in neutral) until the radiator fan comes on.
- Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0134 indicated?
YES -Go to step 5.
NO -Intermittent failure, the 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 (LAF), and the ECM/PCM.
- Turn the ignition switch to LOCK (0).
- Replace the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).
- Turn the ignition switch to ON (II).
- Reset the ECM/PCM with the HDS.
- Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
- Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0134 indicated?
YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM, then go to step 10.
NO -Go to step 11.
- Monitor the OBD STATUS for DTC P0134 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 10, go to the indicated DTCs troubleshooting.
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 (LAF), and the ECM/PCM, then go to step 11. If the screen indicates NOT COMPLETED, keep idling until a result comes on.