how to fix the P0420 code on my Tesla Model S Original (2012-2020)

• •Check engine light illuminated
• •Reduced fuel efficiency
• •Decreased engine performance
• •Unusual exhaust odors
• •Possible engine misfires

1. 1Scan the vehicle’s OBD-II system to confirm the P0420 code and check for any additional codes.
2. 2Inspect the exhaust system visually for signs of damage, leaks, or blockages.
3. 3Measure the temperature before and after the catalytic converter using a pyrometer to check for temperature differential.
4. 4Inspect the O2 sensors for proper function and ensure they are free from contamination.
5. 5Check for exhaust leaks that could affect the readings of the O2 sensors.
6. 6Verify engine performance parameters to ensure no other underlying issues are present.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •O2 sensor socket
• •Wrench set
• •Torque wrench
• •Socket set
• •Jack stands
• •Exhaust pipe cutter

• •O2 sensors (if faulty)
• •Catalytic converter (if necessary)