how to clear the P0420 code on my Tesla Model 3 Original (2017-2023)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Inspect and Replace Oxygen Sensors

1. Locate the Oxygen Sensors: Identify the upstream and downstream oxygen sensors connected to the exhaust system.
2. Remove the Sensors:
   • Use a socket wrench to unscrew the sensors carefully.
   • Disconnect the electrical connectors by pressing the release tab.
3. Install New Sensors:
   • Apply anti-seize compound on the threads of the new sensors.
   • Screw the new sensors into place and reconnect the electrical connectors.

3. Inspect and Replace Catalytic Converter (if necessary)

1. Inspect the Catalytic Converter:
   • Look for signs of physical damage, such as dents or corrosion.
2. Remove Catalytic Converter:
   • Unbolt the catalytic converter from the exhaust system using a socket set.
   • Carefully detach any heat shields or brackets.
3. Install New Catalytic Converter:
   • Position the new catalytic converter and secure it with bolts.
   • Reattach any heat shields or brackets removed during disassembly.

4. Reconnect Battery and Clear Codes

1. Reconnect the Battery:
   • Ensure all connections are tight and secure.
2. Clear the Error Codes:
   • Use an OBD-II scanner to clear the P0420 code from the system.
   • Perform a drive cycle to allow the vehicle’s computer to re-evaluate the system.