how to fix the P0135 code on my Tesla Outback 4th Generation (2010-2014)

Learn how to diagnose and fix P0135 oxygen sensor heater issues in a 2010-2014 Subaru Outback. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts. Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shocks.

2. Remove the Faulty Oxygen Sensor

• Tools Required: Oxygen sensor socket, ratchet, and extension.
• Locate the upstream oxygen sensor on the exhaust manifold.
• Use the oxygen sensor socket to carefully unscrew and remove the faulty oxygen sensor from its mounting.

3. Inspect and Clean the Connector

• Inspect the oxygen sensor connector for corrosion or dirt.
• Clean the connector using electrical contact cleaner to ensure good electrical contact.

4. Install the New Oxygen Sensor

• Parts Required: New upstream oxygen sensor.
• Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
• Screw in the new oxygen sensor by hand, then tighten it to the manufacturer's specifications (usually around 30 ft-lbs).

5. Reconnect Electrical Connections

• Reconnect the oxygen sensor electrical connector ensuring it clicks into place.
• Reconnect the negative battery terminal.

6. Clear the Error Codes

• Tools Required: OBD-II scanner.
• Use the OBD-II scanner to clear the P0135 code from the vehicle's memory.
• Perform a short test drive to allow the vehicle to enter its readiness state.