DTC P0134: A/F Sensor (Sensor 1) Heater System Malfunction (2003-2004 models)

NOTE: If the vehicle was out of fuel and the engine stalled before this DTC was stored, refuel and clear the DTC with the HDS.

Check for a loose A/F sensor (Sensor 1).
Is it loose in the exhaust pipe?
1. YES - Reinstall the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).
2. NO - Go to step 2.
Reset the ECM/PCM (see ECM/PCM RESET (2002-2004 MODELS) ).
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 2 minutes.
Is DTC P0134 indicated?
1. YES - Replace the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).
2. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.