P0456

DTC P0456: Evaporative Emission System Leak Detected (Very Small Leak)

System / Wiring Diagram:

System / Circuit Description
While engine running, ECM (PCM) closes EVAP canister vent valve and opens EVAP canister purge valve. If EVAP emission control system is in good condition, EVAP emission control system pressure that detected by fuel tank pressure sensor becomes down. After that, ECM (PCM) closes EVAP canister purge valve leaving EVAP canister vent valve is closed. If EVAP emission control system is in good condition, the fuel tank pressure rises specified rate.

DTC Detecting Condition and Trouble Area:

Step 1 - 3:

Step 4 - 7:

DTC Troubleshooting