how to fix a clogged catalytic converter in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, jack and jack stands, safety goggles, gloves, exhaust back pressure gauge, temperature gun.
• Ensure the vehicle is on a flat surface and securely lifted with jack stands.
• Disconnect the battery to avoid electrical issues during work.

2. Remove Exhaust Components

• Sub-steps:
  1. Remove the heat shield covering the catalytic converter (if applicable) by unscrewing the retaining bolts.
  2. Loosen the exhaust clamps securing the catalytic converter to the exhaust pipe using a socket set.
  3. Carefully detach the catalytic converter from the exhaust pipe and the flange leading to the muffler.

3. Inspect and Clean Catalytic Converter

• Sub-steps:
  1. Visually inspect the catalytic converter for any signs of physical damage or excessive carbon buildup.
  2. If cleaning is possible, use a specialized catalytic converter cleaner and follow the manufacturer's instructions. Alternatively, soak the converter in a suitable solvent for a few hours.
  3. Rinse the catalytic converter thoroughly with water and allow it to dry completely.

4. Reinstall Components

• Sub-steps:
  1. Reattach the catalytic converter to the exhaust system using new gaskets and clamps.
  2. Reinstall the heat shield if it was removed.
  3. Reconnect the battery terminals.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Use the OBD-II scanner to clear any fault codes related to the catalytic converter.
  2. Start the vehicle and check for leaks in the exhaust system.
  3. Take the vehicle for a test drive to ensure performance has returned to normal.