p0442

I have a 99 saab 9-5 SE. Bought of CL 2 yrs ago. The check engine signal gave p0442 code but no one could figure out problem. Smoketest from saab dealership in Pensacola, Fl, said I need a new gas tank for 1300 because the seal on the top are leaking vapor. Car ran fine. Needed a new fuel...