how to clear P0420 code on my Toyota RAV4 XA50 (2019-2024)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, basic hand tools (sockets, wrenches), backpressure gauge.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Oxygen Sensors

• Sub-steps:
  1. Locate the pre-catalytic and post-catalytic oxygen sensors.
  2. Disconnect the wiring harness from each sensor.
  3. Remove the sensors using an oxygen sensor socket.
  4. Install new oxygen sensors and torque to manufacturer specifications (usually around 30 lb-ft).
  5. Reconnect the wiring harness securely.

3. Inspect and Replace Catalytic Converter (if necessary)

• Sub-steps:
  1. Raise the vehicle securely on jack stands.
  2. Remove any heat shields or components obstructing access to the catalytic converter.
  3. Remove the catalytic converter from the exhaust system by unbolting it from the exhaust manifold and the mid-pipe.
  4. Install the new catalytic converter, ensuring proper alignment and sealing.
  5. Torque the bolts to the manufacturer specifications (typically around 25-35 lb-ft).
  6. Reinstall any removed heat shields.

4. Clear the Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0420 code from the engine control module.