Any guess?

[ES1]

Wife's GS service engine light came on.
Any guesses as to what maybe throwing a code on a 39,ooo mile car?
She said the car was running alright.
I disconnected battery and the code was still there.


TIA
ES

 

[mcad_c]

Missfires or losse gas cap. Are very common.

 

[ES1]

Thanks, will check the cap.