how to fix P0456 code on Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0456 code indicating a small leak in the EVAP system on Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, smoke machine, basic hand tools, replacement parts if needed.
• Safety Warnings: Ensure the vehicle is in a well-ventilated area to avoid inhaling fumes.

2. Inspect and Replace Gas Cap

• Remove the gas cap and inspect for cracks or damage.
• If the gas cap is damaged, replace it with a new one.
• Reinstall the new gas cap and ensure it clicks securely.

3. Inspect EVAP System Components

• Sub-steps:
  • Locate the EVAP canister, purge valve, and vent valve.
  • Check the hoses for wear and tear; replace any damaged hoses.
  • Ensure all connections are secure and free from debris.

4. Perform a Smoke Test

• Connect the smoke machine to the EVAP system through the service port.
• Introduce smoke into the system and observe for any leaks.
• If a leak is found, repair or replace the faulty component.

5. Replace Faulty Components

• If the smoke test reveals a leak from specific components (e.g., vent valve, purge valve), remove and replace them.
• Follow manufacturer specifications for torque values during reinstallation.

6. Clear Error Codes

• After making repairs, use the OBD-II scanner to clear the P0456 code.
• Monitor the system for any reoccurrence of the code.