how to fix P0138 code in Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety.

2. Remove the Oxygen Sensor

• Locate the Bank 1 Sensor 2 oxygen sensor (usually located after the catalytic converter).
• Use an oxygen sensor socket or wrench to unscrew the sensor from the exhaust system.
• Disconnect the electrical connector from the sensor.

3. Inspect and Replace

• Inspect the old oxygen sensor for signs of wear or damage.
• If necessary, replace the oxygen sensor with a new one (ensure it meets OEM specifications).
• Apply anti-seize compound to the threads of the new sensor (if not pre-applied).

4. Reinstallation

• Reconnect the electrical connector to the new oxygen sensor.
• Screw the new sensor into place and tighten it to the manufacturer’s torque specifications (typically around 30 ft-lbs).
• Reconnect the vehicle battery.

5. Final Checks

• Start the engine and allow it to reach operating temperature.
• Monitor the new sensor readings using the OBD-II scanner to ensure it's functioning correctly.