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 SystemsHow to Troubleshoot the CVT System(CVT System) .
• 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 (in P or N) 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 the 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 PGM-FI subrelay, 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.