how to fix P0136 oxygen sensor code on my Volkswagen Passat B8 (2015-2022)

Learn how to diagnose and fix P0136 O2 sensor code on Volkswagen Passat B8 (2015-2022). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the exhaust system to cool down before working on it.

2. Remove the Faulty O2 Sensor

1. Locate the Bank 1 sensor 2 O2 sensor (usually found downstream of the catalytic converter).
2. Use an oxygen sensor socket or wrench to carefully unscrew the O2 sensor from its mounting location.
3. Disconnect the electrical connector from the sensor.

3. Inspect and Clean Connector

1. Check the electrical connector for signs of corrosion or damage.
2. If necessary, clean the connector using electrical contact cleaner.
3. Ensure the pins are not bent or damaged; repair as needed.

4. Install the New O2 Sensor

1. Apply anti-seize compound (if recommended) to the threads of the new O2 sensor.
2. Screw the new sensor into the exhaust pipe and tighten to manufacturer specifications (typically around 30-40 Nm).
3. Reconnect the electrical connector securely.

5. Reconnect Battery and Test

1. Reconnect the negative battery terminal.
2. Start the engine and allow it to reach operating temperature.
3. Use the OBD-II scanner to check for any trouble codes and to ensure the P0136 code does not return.