my check engine light just popped on yesterday for the first time ever the car still runs good what could it be
You DID NOT stop at the first click, but proceeded to "TOP IT OFF"...well this fills up the carbon canister....the evaporative emissions systems no longer has control turning on the check engine light....drive for a month...never filling more than the first click and your problem will go away~
Have the codes read. Your local auto parts store will do it for free. Post codes back on here and we will be able to help you more.
if you did invest in a fourteen dollar OBD-II handheld scanner, it'd show the trouble code for evaporative emissions charcoal canister fault~
the code p04o2
Looking for a Used Grand Marquis in your area?
CarGurus has 2,201 nationwide Grand Marquis listings starting at $1,995.
Search Mercury Grand Marquis Questions
Mercury Grand Marquis Experts