Rear Brake job added Benefit/Engine Light went off

Before changing the rear breakes, I had a "service Engine" code P0441 (Evaporative Emission Control System Incorrect Purge Flow). It has been on for over 6 months. After changing the rear brakes it is now off. This does not make any sence what so ever! Any one got a clue why this would happen.

99 Grand Caravan 3.3L It is probably just a coincidence. The problem may have temporarily corrcted itselfs and then the light cleared. OBD2 is set to clear the light after 50 successfull start cycles.......or your light blew out.

You were right, the light is back on. But what a hell of a coincidence.