how to fix a faulty oxygen sensor in Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle battery to ensure safety.

2. Remove the Faulty Oxygen Sensor

• Locate the faulty oxygen sensor, typically found in the exhaust manifold or downstream in the exhaust system.
• Use a socket wrench to unscrew the oxygen sensor from its mounting.
• Carefully disconnect the electrical connector from the sensor.

3. Install the New Oxygen Sensor

• Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
• Screw the new oxygen sensor into the exhaust system by hand to avoid cross-threading, then tighten it with the socket wrench to the manufacturer's specified torque (usually around 30-40 Nm).
• Reconnect the electrical connector to the new oxygen sensor, ensuring it is secure.

4. Reconnect Battery and Test

• Reconnect the vehicle battery.
• Start the engine and allow it to reach operating temperature. Check for any exhaust leaks around the new sensor.
• Use the OBD-II scanner to clear any existing error codes.