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P0449 Diagnostic Trouble Code Discussion for March 2009

EVAP Vent Solenoid Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0449
Help Request Posted
2006 GMC Sierra 1500 SLE 4.8L MIL Lamp on VIN: 1GTEK19V56
P0449: EVAP Vent Solenoid Control Circuit Malfunction. When Going Through The Tests For Code P0449, Harness At Solenoid Disconnected, Battery Voltage Is Present But So Isn't The Ground From ECM. Always. As Soon As The Key Is Turned On The Ground Is Present. Using Scan Tool Has No Affect On The Ground. Disconnected...
March 05, 2009
2007 Chevrolet Silverado 1500 Classic LT 5.3L MIL Lamp on VIN: 1GCEK19Z47
P0449: EVAP Vent Solenoid Control Circuit Malfunction. Truck came in with check engine light on. Code po449. With tech 2 toggling vent valve - It would not click or work. Ohm'd out vent valve & was over 1 million ohms. Changed part & now clicks/works GREAT. Cust. picked up truck & code resets(449)- Che...
March 16, 2009