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

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, infrared thermometer, socket set, torque wrench.
• Gather necessary parts for repair or replacement of the catalytic converter or sensors.
• Ensure the vehicle is on a flat surface and the engine is cool.

2. Inspect and Replace Oxygen Sensors

• Sub-steps:
  1. Disconnect the vehicle’s battery to ensure safety.
  2. Locate the upstream (pre-catalytic converter) and downstream (post-catalytic converter) oxygen sensors.
  3. Use a socket set to remove the oxygen sensors.
  4. Inspect the sensors for signs of damage or contamination.
  5. Replace any faulty oxygen sensors with new ones, ensuring to use OEM parts for better compatibility.
  6. Reconnect the battery.

3. Inspect and Replace the Catalytic Converter

• Sub-steps:
  1. Safely lift the vehicle using jack stands and remove the undercarriage cover if applicable.
  2. Disconnect the exhaust pipes connected to the catalytic converter using a socket set.
  3. Remove any supporting brackets that may be holding the catalytic converter in place.
  4. Carefully remove the old catalytic converter.
  5. Install the new catalytic converter, ensuring proper alignment.
  6. Reattach the exhaust pipes and any brackets, tightening them to the manufacturer’s specified torque values.

4. Clear the Codes

• Sub-steps:
  1. Use the OBD-II scanner to clear the P0420 code from the vehicle’s memory.
  2. Start the engine and allow it to reach operating temperature.