how to fix P0420 code on Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid any electrical shorts.
• Allow the exhaust system to cool before starting the repair.

2. Inspect and Replace Oxygen Sensors

1. Locate the upstream and downstream oxygen sensors.
2. Use a wrench to remove the oxygen sensors.
3. Inspect the sensors for damage or contamination.
4. Install new oxygen sensors by tightening them to the manufacturer’s specifications (usually around 30 ft-lbs).
5. Reconnect the electrical connectors.

3. Inspect and Replace the Catalytic Converter (if necessary)

1. Remove the exhaust pipes connected to the catalytic converter using a socket set.
2. Check for any signs of damage or clogging in the catalytic converter.
3. If replacement is necessary, install the new catalytic converter and ensure it fits securely.
4. Use a torque wrench to tighten the bolts to the manufacturer’s specified torque settings.
5. Reconnect the exhaust system.

4. Clear Codes and Test Drive

1. Use the OBD-II scanner to clear the P0420 code from the vehicle’s computer.
2. Reconnect the battery.
3. Start the engine and monitor for any warning lights.
4. Take the vehicle for a test drive to ensure the issue is resolved.