how to fix P0420 code on Tesla Outback 4th Generation (2010-2014)

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is cool.
• Gather all necessary tools and parts.

2. Replace Faulty Oxygen Sensors

• Tools Required: O2 sensor socket, ratchet, torque wrench
• Sub-steps:
  1. Disconnect the negative battery terminal.
  2. Locate the upstream and downstream oxygen sensors.
  3. Remove the sensors using the O2 sensor socket.
  4. Install new oxygen sensors, tightening them to the manufacturer's specified torque (typically around 30 lb-ft).
  5. Reconnect the electrical connectors.

3. Inspect and Replace Catalytic Converter

• Tools Required: Socket set, jack and jack stands, exhaust pipe cutter (if necessary), torque wrench
• Sub-steps:
  1. Raise the vehicle using a jack and secure it on jack stands.
  2. Remove any heat shields covering the catalytic converter.
  3. Disconnect the exhaust pipes from the catalytic converter using a socket set.
  4. If necessary, use an exhaust pipe cutter to remove the old catalytic converter.
  5. Install the new catalytic converter, ensuring proper alignment.
  6. Reconnect the exhaust pipes and tighten them to the specified torque (typically 25-30 lb-ft).
  7. Reinstall the heat shields.

4. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0420 code from the computer.