how to fix a faulty oxygen sensor in Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical short circuits.
• Allow the engine to cool down.

2. Remove the Faulty Oxygen Sensor

• Locate the oxygen sensor; it is typically found on the exhaust manifold or downpipe.
• Use a 22mm oxygen sensor socket to carefully unscrew the sensor from its mounting location.
• Disconnect the electrical connector by pressing the release tab and pulling it apart.

3. Install the New Oxygen Sensor

• Apply a small amount of anti-seize compound to the threads of the new oxygen sensor (do not get any on the sensor tip).
• Screw the new oxygen sensor into the exhaust system by hand to avoid cross-threading.
• Tighten the sensor to the manufacturer's specified torque (usually around 30-40 ft-lbs, refer to service manual for exact spec).
• Reconnect the electrical connector until it clicks securely.

4. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and let it run for a few minutes to allow the ECU to recalibrate.
• Check for any exhaust leaks around the sensor area.