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

• •Check engine light illuminated
• •Decreased fuel efficiency
• •Poor acceleration or performance
• •Unusual exhaust smells (rotten egg odor)
• •Increased emissions during inspection

1. 1Scan for error codes using an OBD-II scanner to confirm P0420 code and check for additional codes.
2. 2Inspect the exhaust system visually for any obvious leaks or damage to the catalytic converter and surrounding components.
3. 3Check the oxygen sensors (pre- and post-catalytic converter) with a multimeter to ensure they are functioning correctly.
4. 4Measure the temperature difference between the inlet and outlet of the catalytic converter using a temperature probe.
5. 5Inspect for any exhaust leaks upstream of the catalytic converter that could affect sensor readings.
6. 6Check the fuel trim levels using the OBD-II scanner to ensure the engine is running within the expected parameters.

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
• •Multimeter
• •Temperature probe
• •Socket set
• •Jack and jack stands
• •Safety goggles
• •Gloves

• •Oxygen sensors (1 upstream, 1 downstream)
• •Catalytic converter (if found defective)