just got a 98 gt 4.6 convertible 5speedyesterday, and i've driven it home and put less than 100 miles on it; check engine light has already come on, so i'm probably going to return it to work. but, i've never owned a mustang before, my other car is a camaro but i thought i'd try out the fords at least. i know a check engine light could be one of abouttt 500 things, but is there anything anyone can suggest checking before i just return it because i think its a great car. its only got 38,000 miles on it and is in great condition, so the person took good care of it i'd assume. if i disconnected the battery for a while would it reset and turn the light off if everything checks out? its got a few modifications, but just the bolt-ons, like cold air, exhaust, and some gears but that shouldnt affect a check engine light... haven't put gas in it yet so its not the fuel cap. i'm hoping its just an o2 sensor, but theres no way to know unless i get it hooked up to a computer so another question is, does a place like advance or auto zone do that for free. let me know because i dont want to have to return this car within a week of buying it.... thanks in advance.

 

get a code reader and find out for sure. You can buy 1 from 30.00 up you might need mil eliminators

 

take it to autozone or advanced auto and they will check it for free do this before buying parts thats you might not need.