how to fix P0420 code in Tesla Outback 6th Generation (2020-2024)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle’s battery for safety.
• Ensure the vehicle is parked on a flat surface and secured with wheel chocks.

2. Inspect and Replace Oxygen Sensors

1. Locate the upstream (pre-catalytic converter) and downstream (post-catalytic converter) oxygen sensors.
2. Using a socket wrench, carefully remove the upstream oxygen sensor first.
3. Install the new upstream oxygen sensor and torque it to manufacturer's specifications (typically around 30 lb-ft).
4. Repeat the process for the downstream oxygen sensor.
5. Reconnect the vehicle’s battery.

3. Check and Replace Catalytic Converter (if necessary)

1. If the oxygen sensors are in good condition, inspect the catalytic converter for clogs or damage.
2. If replacement is required, unbolt the catalytic converter from the exhaust system using a socket set.
3. Remove any heat shields or brackets attached to the catalytic converter.
4. Install the new catalytic converter, ensuring correct alignment and securing it with bolts to the specified torque.
5. Reinstall any heat shields or brackets that were removed.

4. Final Checks

1. Start the engine and allow it to reach operating temperature.
2. Use the OBD-II scanner to clear the P0420 code and any related codes.
3. Take the vehicle for a short test drive to ensure the check engine light does not reappear.