how to fix P0456 code on Tesla Model 3 Highland (2024-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the high-voltage battery pack for safety.

2. Inspect and Replace the Gas Cap

• Tools Required: Socket set, torque wrench
• Remove the gas cap and inspect for cracks or damage.
• If damaged, replace the gas cap with a new one.
• Ensure the new gas cap is properly torqued to the manufacturer's specifications.

3. Perform Smoke Test

• Tools Required: Smoke machine
• Connect the smoke machine to the EVAP service port.
• Activate the smoke machine and observe for smoke leaking from any EVAP components.
• Identify and repair any leaks discovered during the test.

4. Inspect EVAP Canister and Hoses

• Remove any underbody covers if necessary to access the EVAP canister.
• Visually inspect the canister and hoses for cracks, breaks, or disconnections.
• Replace any damaged components with OEM parts.

5. Reset the OBD-II System

• Reconnect the high-voltage battery pack.
• Use the OBD-II scanner to clear the P0456 code from the system.
• Start the vehicle and allow it to warm up to operating temperature.