what does it mean when my Toyota RAV4 Fifth Generation (2019-present) shows a check engine light wit...

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid electrical shocks.

2. Inspect and Replace Oxygen Sensors

• Tools Required: O2 sensor socket, wrench set, torque wrench
• Remove the oxygen sensor from the exhaust system using the O2 sensor socket.
• Inspect the sensor for damage or contamination.
• If the sensor is faulty, replace it with a new one, ensuring it is compatible with your vehicle model.
• Torque the new sensor to the manufacturer’s specifications (typically around 30 lb-ft).
• Reconnect the battery.

3. Inspect and Replace Catalytic Converter

• Tools Required: Socket set, cutting tools (if necessary), torque wrench
• Disconnect the exhaust pipes from the catalytic converter using the socket set.
• If necessary, cut the old catalytic converter out using a cutting tool.
• Install the new catalytic converter in place, ensuring proper alignment with exhaust pipes.
• Torque the exhaust bolts to the manufacturer’s specifications.
• Reconnect any sensors that were disconnected during the process.

4. Clear Diagnostic Codes

• Tools Required: OBD-II scanner
• Use the OBD-II scanner to clear the P0420 code from the vehicle’s computer.
• Start the engine and allow it to reach operating temperature.