2 days after replacing a weak battery during a cold snap the engine light came on. 2 days prior to replacement the gas cap warning and engine light came on, but immediately after the installation both warnings went off. Only the engine light came back on 2 days later. I have driven the Jeep 3 times since for about 20 miles total. Total mileage, 18,200. Any ideas or comments about what the cause may be and how to proceed? Cheers, Ben
There are many reasons why the CEL light can be turned on. It may be for the same thing as before or some other reason. You need to have the error codes checked by some place like Autozone that will check them for free and let us know what the active codes are before we can recommend any service tips.
That CEL (check engine light) is just a kid in class waving her hand trying to get you attention because she has the answer. You need to have the codes read. Some places will read them for FREE. Try Autozone or Advanced Auto Parts. Get the exact code (like P0123) not just their translation into English and post it back here.