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

• •Check engine light illuminated
• •Reduced engine performance
• •Increased exhaust emissions
• •Poor fuel economy
• •Unusual exhaust odors
• •Possible overheating of the catalytic converter

1. 1Scan the vehicle's computer using an OBD-II scanner to confirm the P0420 code and check for any other related codes.
2. 2Inspect the catalytic converter for physical damage, such as dents, rust, or leaks.
3. 3Check the exhaust system for leaks or blockages that could affect the catalytic converter's performance.
4. 4Test the upstream and downstream oxygen sensors using a multimeter to ensure they are functioning properly.
5. 5Review the vehicle's service history for any previous issues related to the exhaust system or catalytic converter.
6. 6Monitor the O2 sensor voltage readings with a scan tool to look for irregular patterns that may indicate a faulty sensor.

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
• •Jack stands
• •Exhaust pipe cutter

• •Upstream oxygen sensor
• •Downstream oxygen sensor
• •Catalytic converter