will a bad gas filler neck gasket cause a p0455 code

Question

service engine light stays on

Answer 1

Yes, a P0455 - Evaporative Emission Control System Leak Detected Gross Leak can be caused by a bad gas filler necket gasket 

Possible causes

- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking