Symptoms of P0455 OBD II Trouble Code
- A loose or improperly affixed gas cap
- A non-conforming gas cap (i.e. not factory/original brand)
- Other leak or damaged piece in EVAP system
Common Causes of P0455 OBD II Trouble Code
- Remove and reinstall the gas cap, clear the codes, and drive for a day and
see if the codes come back. - Otherwise, replace the gas cap, and/or
- Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum
noise or smell fuel), repair if necessary