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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Replace Oxygen Sensors

1. Remove the Old Sensors:

   • Disconnect the battery to prevent electrical shorts.
   • Use an oxygen sensor socket and ratchet to remove the upstream and downstream oxygen sensors.

2. Install New Sensors:

   • Apply anti-seize compound to the threads of the new oxygen sensors (if not pre-applied).
   • Install the new sensors by hand to avoid cross-threading, then tighten to the manufacturer’s specifications (typically 30-40 ft-lbs).
   • Reconnect the electrical connectors.

3. Inspect and Replace Catalytic Converter (if necessary)

1. Remove Exhaust Components:

   • Loosen and remove any bolts or clamps securing the exhaust system to access the catalytic converter.
   • If necessary, cut the exhaust pipe with a reciprocating saw or use a pipe cutter.

2. Install New Catalytic Converter:

   • Position the new catalytic converter and secure it with bolts or clamps according to manufacturer specifications.
   • Ensure all gaskets are in good condition and replace if necessary to prevent leaks.

4. Clear Error Codes

• Reconnect the battery and use the OBD-II scanner to clear the P0420 code from the ECU.
• Start the engine and allow it to reach operating temperature.