2005 CHEVROLET EQUINOX P0455 AND P0496 EVAP SYSTEM FAULTS - DIAGNOSIS AND FIX
I own a 2005 Chevrolet Equinox with the check engine light on. The vehicle is displaying fault codes P0455 and P0496, both related to the Evaporative Emission Control System (EVAP). These codes typically indicate leaks in the EVAP system or issues with the fuel cap. I'm seeking advice on how to diagnose and resolve these codes accurately.
P0455 and P0496 are EVAP system leak codes — often referred to as 'gas cap codes' since the fuel cap is a common starting point for diagnosis. Always begin by checking the fuel cap seal and tightness. If that doesn't resolve it, further inspection of hoses, charcoal canister, and purge valve may be needed. More details available at: https://www.obd-codes.com/p045-1