Chevrolet Traverse Check Engine Light and P0496 Code Due to Stuck Open Purge Valve and Engine Starting Issues After Refueling on Chevrolet Traverse

Some Chevrolet Traverse owners report experiencing a check engine light accompanied by a P0496 trouble code, indicating high purge flow in the Evaporative Emission Control System. This issue is often linked to a faulty purge valve, which can lead to symptoms such as rough idle after fueling. Owners are cautioned that ignoring the P0496 code may result in more significant problems, as the Engine Control Module monitors the EVAP system and triggers the code when purge flow is excessive. Additionally, some owners find that a stuck open purge valve can cause engine starting issues after refueling, as it disrupts the proper flow of fuel vapors to the engine. To diagnose this, disconnecting the EVAP hose while the engine is running can help determine if there is vacuum in the lines connected to the valve. Addressing a stuck open purge valve is essential for resolving these issues, as proper diagnosis and potential replacement can ensure the vehicle operates smoothly.