RepairPal Certified shops can diagnose and repair your 2005 Volvo S40. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Did you use a Volvo gas cap? If not, you should.
You'll have to have the evaporative system checked out, there may be a leak in the system, or a defective sensor.
yes changed cap with one from dealer, was told to drive for a while ........ even went as far as clearing codes and that did not work