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

Learn how to diagnose and fix P0456 EVAP system leak in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, smoke machine, basic socket set, torque wrench
• Ensure the vehicle is parked on a flat surface and the engine is off. Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Fuel Filler Cap

• Sub-steps:
  1. Remove the fuel filler cap and visually inspect the gasket for cracks or debris.
  2. If damaged, replace the fuel filler cap with a new OEM part.
  3. Reinstall the cap and ensure it clicks securely.

3. Inspect EVAP System Components

• Sub-steps:
  1. Locate the EVAP canister and inspect for physical damage or cracks.
  2. Check all hoses connected to the EVAP canister for wear or disconnections.
  3. Replace any damaged hoses or the EVAP canister if necessary.

4. Test EVAP Components

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use a smoke machine to introduce smoke into the EVAP system and observe for leaks.
  3. If leaks are found, replace the faulty component (purge valve, vent valve, or canister).

5. Clear Codes and Test

• Sub-steps:
  1. Use the OBD-II scanner to clear the P0456 code from the vehicle’s computer.
  2. Take the vehicle for a test drive to allow the EVAP system to perform a self-check.
  3. Monitor the system for any reoccurrence of the P0456 code.