Posts Tagged: gas cap

P0455 definition

P0455 Evaporative Emission Control System Leak Detected (Gross Leak) If you have a P0455 Evaporative Emission Control System Leak Detected (Gross Leak), first check to make sure the gas cap is installed and torqued properly. The Evaporative Emissions system has applied a vacuum to the fuel system and detected a major leak. This is usually a sign that you’ve left the gas cap off, or that the gas cap is not sealing properly against the neck of the filler tube. First, check the gas cap to make sure it’s tight. … Read More