P0455

K : P0455. Gross Leak Detected.

K1 : CHECK FUEL FILLER CAP FITMENT AND CONDITION OF PIPES AND CONNECTORS.
1. Ensure that the fuel filler cap is correctly installed and tightened. (minimum 3 clicks)
2. Check the condition of all accessible pipes and connectors in the vapor line.

Are all pipes and connectors in good condition?

Yes
Suspect concern with -
1. Blockage in vapor line. (engine to fuel tank)
2. EVAP/purge valve stuck closed.
3. Fuel tank assembly.
4. carbon canister assembly.

No
REPAIR as necessary. CLEAR the DTC. Carry out a full Evap system monitor drive cycle, recheck DTCs. For additional information, see 'diagnostic drive cycles'. Diagnostic Drive Cycles