P0456 — EVAP Emission Control System Leak Very Small

What does P0456 mean?

This code indicates a very small leak has been detected in the evaporative emission control (EVAP) system. This is the smallest leak size detected by the system.

• Loose or damaged gas cap
• Minor crack in an EVAP hose
• Leaking seal on a component
• Faulty fuel tank pressure sensor

Click steps to track your progress.

1. 1

   Ensure the gas cap is securely tightened.

2. 2

   Inspect EVAP hoses and components for any very small cracks or damage.

3. 3

   Check seals on EVAP system components for leaks.

4. 4

   Consider testing the fuel tank pressure sensor.