my Tesla Model Y Current (2020-present) shows P0420 code what does that mean

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, inspection camera (optional).
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.
• Allow the vehicle's exhaust system to cool before starting work.

2. Inspect and Replace Oxygen Sensors

• Sub-steps:
  1. Remove the upstream oxygen sensor using a socket wrench.
  2. Use a multimeter to test the resistance of the sensor; replace it if it is out of manufacturer specifications.
  3. Repeat the process for the downstream oxygen sensor.
  4. Install the new oxygen sensors, ensuring proper torque (consult manufacturer specifications for torque values).

3. Examine and Replace Catalytic Converter

• Sub-steps:
  1. Inspect the catalytic converter for any signs of external damage or blockage.
  2. If damaged, remove the catalytic converter by unbolting it from the exhaust system.
  3. Install a new catalytic converter, ensuring that all gaskets and seals are replaced and that the bolts are torqued to manufacturer specifications.
  4. Reconnect the exhaust system components.

4. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0420 code and any other codes present.
  3. Test drive the vehicle under various conditions to ensure the code does not reappear and that performance is restored.