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I got P0455 (Evap large leak)code on my 2007 chevrolet uplander.

when my fuel tank s full it was ok but the P0455 code keep on coming back during when my fuel tank is half full. what is the possible problem with my car with P0455.My gas cap is new OEM.

Vehicle: 2007 Chevrolet Uplander LT gasoline
asked Apr 14, 2013 by anonymous

1 Answer

The P0455 code means that there is a leak in the EVAP system. The evap system includes the EVAP canister and hoses. If the gas cap is new, the next step is checking the hoses and EVAP canister above the gas tank.

2007 Chevrolet Uplander EVAP Canister

answered Apr 15, 2013 by OBDIITech (2,422 points)
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