how to fix P0420 code on Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the vehicle battery to ensure safety.

2. Inspect and Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, wrench set, torque wrench
• Steps:
  1. Locate the upstream and downstream oxygen sensors in the exhaust system.
  2. Use the O2 sensor socket to remove the upstream sensor, followed by the downstream sensor if replacement is needed.
  3. Install the new oxygen sensor(s) and torque to manufacturer specifications (typically around 30 ft-lbs).
  4. Reconnect the electrical connectors to the oxygen sensors.

3. Inspect and Replace Catalytic Converter (if necessary)

• Tools Required: Socket set, jack and jack stands, exhaust pipe cutter (if needed)
• Steps:
  1. Raise the vehicle securely on jack stands.
  2. Inspect the catalytic converter for any signs of damage or blockage.
  3. If replacement is necessary, unbolt the catalytic converter from the exhaust system.
  4. Install the new catalytic converter, ensuring proper alignment and tightening bolts to the recommended torque.
  5. Check for exhaust leaks after installation.

4. Clear Diagnostic Codes

• Tools Required: OBD-II scanner
• Steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0420 code from the vehicle’s memory.
  3. Take the vehicle for a test drive to ensure the code does not reappear.