I bought a 99 Ford Windstar yesterday, and today the check engine light came on. The oil and transmission fluid are fine, I took it to auto zone, and they put it on some machine that is supposed to tell you a code to see what is wrong, but it didn't show anything... what to do now?

1) Engine oil and trans fluid do not make a MIL light come on.
2) Don't go to Auto Zone; all they have is a generic code scanner which gives you an idea as to what's wrong, but won't always tell you exactly what it is.

Drive it for 2-3 days and see if it shuts off. If not, take it to a real mechanic and have them do a computer test with an actual diagnostic computer, not a handheld scanner like AutoZone. It could be something as simple as a loose gas cap.

I thought it might be the fuel injectors, so I put some fuel injector cleaner in it and the check engine light went off, thak you for the reply. When I get home I am going to put some sea foam in the intake valves, to clean it out

Was the gas cap loose? Was it really a EVAP code hiding...

I do not know what was wrong with it honestly, but the fuel injector cleaner made the light go off. I cleaned the injectors last night with sea foam, and the van runs 100% better now. Thank you for the reply.:) ;) :rolleyes:

Was just curious.
These are notorious for PO1481 evap code. Since you added the FI cleaner you had to have the gas cap off.

All is well then.

Yeah... all is good. Thank you.