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

• •Check engine light illuminated
• •Reduced engine performance
• •Increased fuel consumption
• •Failure to pass emissions test
• •Unusual exhaust smell

1. 1Scan the vehicle's OBD-II system using a compatible scanner to confirm the P0420 code.
2. 2Inspect the exhaust system for visible leaks or damage.
3. 3Check the catalytic converter for physical signs of failure (e.g., dents, rust).
4. 4Measure the temperature difference between the inlet and outlet of the catalytic converter to assess efficiency.
5. 5Verify that the oxygen sensors before and after the catalytic converter are functioning correctly by checking their parameters.
6. 6Inspect for any vacuum leaks in the intake system that may affect engine performance.

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
• •Oxygen sensor socket
• •Socket set
• •Torque wrench
• •Safety gloves
• •Safety goggles

• •New oxygen sensors (if faulty)
• •New catalytic converter (if necessary)
• •Exhaust gaskets