WHEN I START ENGINE THE CHECK GAS CAP LIGHT GOES ON AND NOW THE CHECK AIR BAG LIGHT ALSO .WHAT CAUSES THIS AND HOW MUCH IS THE REPAIR
WHY DOES THE CHECK GAS CAP WARNING KEEPS LIGHTING UP?
AND THE CHECK AIR BAG on 2002 Cadillac DeVille
The check gas cap could be from low pressure reading due to the gas cap not being tightened properly after a fill-up and may go away in time. If not, there is a leak in the vapor recovery system such as a cracked or dislodged vacuum hose or a rusty filler neck. Check air bag light is either a loose wire in the sensors or a failing clock spring on the steering wheel.
have it scan tested for codes and go from there
you have 2 seperate issues evap leak of some kind and a srs issue. seek diag and est