Tank Filler Pipe And Cap problems of the 1996 Chevrolet Cavalier

Engine light has come on/ off. Consumer replaced gas cap. Took vehicle to a private mechanic that diagnosed vehicle with computer. Mechanic reset computer to remove engine light, however, engine light came back on 2 days afterwards. The dealer pointed out that there had been a recall on problem of the engine light coming on, but the manufacturer had not notified the consumer.