Decoding P0455 Code A Guide to Emissions System Diagnosis

I know the code is for EVAP leak (can't remember the exact verbage)...and I know most people (including myself) will say "just check the gas ... If a vacuum hose is totally comprimised/separated/unseated, it'll detect a larger leak and throw P0455. Code P0455 is related to a leak in your vehicle's evaporative emissions (EVAP) system. Have it checked out soon by a trusted CarAdvise shop. So, what does the code P0455 mean? A sensor has noted a large leak somewhere in the system so that a vacuum cannot be created. While an EVAP system isn't ... P0455 looks like an EVAP code. For DTC P0455 (large leak detected), the vehicle will set the code due to large leak or purge blockage. System gross leak evaporative emissions (often associated with P0440 code). P0455 indicates a significant leak in the vapor recovery system. Its a guess that you mean an Automobile OBD-II System as that is the form that their error codes are listed. Is your check engine light on? Are you experiencing fuel-related issues or noticing a strong smell of gasoline around your car? For example, you could ask, 'What does a bad ECM mean?' or 'What is the P0420 code ... P0455 FORD · P0011 NISSAN · P0171 · P0300 · P0340 · P0171 FORD · P1320 ... Most common cause for p0455 is a faulty gas cap which you already know. Other causes could be a bowl vent solenoid, vapor canister, or purge ...