DTC P0456: EVAP System - Very Small Leak Detected: Condition
WARNING: This page is about a different car, the 2003 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0456 is set when fuel tank pressure increases more than specified value, a very small leak in EVAP system is detected. Possible causes are:
- ECM malfunction.
- EVAP canister.
- EVAP canister control valve.
- EVAP control system circuits malfunction.
- EVAP control system vacuum hoses malfunction.
- Fuel level sensor malfunction.
- Fuel tank component malfunction.
- Fuel Tank Pressure (FTP) sensor malfunction.
- Leaking fuel pump assembly seal on fuel tank.
- Missing, loose or malfunctioning fuel filler cap, or leak from cap gasket.