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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, infrared thermometer, multimeter, safety gloves, safety glasses, jack and jack stands.
• Sub-steps:
  • Disconnect the negative terminal of the battery to ensure safety while working on the vehicle.
  • Raise the vehicle using a jack and secure it with jack stands.

2. Inspect and Replace Oxygen Sensors (if necessary)

• Sub-steps:
  • Locate the upstream and downstream oxygen sensors (usually found on the exhaust pipe before and after the catalytic converter).
  • Use a socket wrench to remove the sensors.
  • Inspect the sensors for damage or contamination. If they appear faulty, replace them with OEM or high-quality aftermarket sensors.
  • Reinstall the new sensors and torque them to the manufacturer's specifications (typically around 30 ft-lbs).

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

• Sub-steps:
  • Check the catalytic converter for physical damage or clogging.
  • If replacement is needed, unbolt the catalytic converter from the exhaust system using the socket set.
  • Install the new catalytic converter and torque the bolts to specifications (usually around 30-40 ft-lbs).
  • Make sure to check the gasket condition and replace it if necessary to prevent exhaust leaks.

4. Clear the Error Codes

• Sub-steps:
  • Reconnect the battery terminal.
  • Use the OBD-II scanner to clear the P0420 and any other related error codes.
  • Start the vehicle and allow it to reach operating temperature.