2001 Mustang - Fuel Cap Warning Light
My daughter has a 2001 bare-bones Mustang (by bare-bones, I means it's just a basic coupe, not a GT or anything like that.)
Her problem is this. There is a "fuel cap" light on the instrument panel. It lights up, then a few minutes later the "service engine soon" light comes on. We've had the codes read, and were told twice that replacing the fuel cap will fix the problem.
I spent $30.00 for a fuel cap from the local Ford dealer. In the meantime, I disconnected the battery because I had to change out the driver's side headlight. Of course, this cleared the codes. However, after the computer finished cycling through over a 48 hour period of driving, the lights both came back on. I had the codes checked, and got the same message.
This happened about a year ago, too, with the same results (new cap, two days later the light comes back on).
Any thoughts, ideas, etc., etc.