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

NOTE: 

• Before you troubleshoot, review the general troubleshooting information - Refer to: HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS or How to Troubleshoot the CVT System (CVT) .
• If DTC P0135 is stored at the same time as DTC P0134, troubleshoot DTC P0135 first, then recheck for P0134.

DTC (PGM-FI)

1. Problem verification:

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Start the engine, and let it idle without load (CVT in P or N, M/T in neutral) for at least 1 minute.

   - 4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0134 A/F Sensor (Sensor 1) Heater System Malfunction

   Is DTC P0134 indicated?

   YES 

   The failure is duplicated. Replace A/F sensor (Sensor 1) .

   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 ETCS control relay, and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.