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What does P0496 evap emission high purge flow fault mean?

In: Pontiac Sunfire [Edit categories]

Answer:

this code defines a unwanted amount of vapors being released in system, usually this code pertains to a faulty purge valve & or could be the tanks pressure sensor.
sometimes a faulty gas cap, but usually that is another code. the po496 is high purge flow detection, and can cause irregular starting conditions after a fill up. sometimes it makes it very difficult to start, and engine shows signs of stumbling. this type of testing should be done by a certified emissions technician that has special system pressurizing equipment.otherwise you can be replacing a lot of not needed components.usually i find a purge valve leaking with this code. hope this helps someone..

First answer by ID1090784500. Last edit by ID1090784500. Question popularity: 1 [recommend question].

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