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P0449 Diagnostic Trouble Code Discussion for January 2015

EVAP Vent Solenoid Control Circuit Malfunction


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Trouble Ticket Help Requests for DTC P0449
Help Request Posted
2007 GMC Sierra 1500 WT 5.3L Excessive Emissions, MIL Lamp on VIN: 2GTEK13M57
P0449: EVAP Vent Solenoid Control Circuit Malfunction. MAF replaced with harness smoked intake-found no leaks come off idle fuel trims are great- idle engine long term go high short term are perfect. gotta have a vacuum leak somewhere!!! pulled upper intake manifold -found gaskets were deformed. problem still ther...
January 16, 2015
2007 GMC Sierra 1500 WT 5.3L Excessive Emissions, MIL Lamp on VIN: 2GTEK13M57
P0449: EVAP Vent Solenoid Control Circuit Malfunction. MAF replaced with harness smoked intake-found no leaks come off idle fuel trims are great- idle engine long term go high short term are perfect. gotta have a vacuum leak somewhere!!! pulled upper intake manifold -found gaskets were deformed. problem still ther...
January 22, 2015