Emmissions problem. HAVE THE ENGINE CHECKED!
If the light stays on after start up- you need to check your oil.
If the check engine light is on, use a code scanner to find out why.
Have vehicle scanned to determine the problem usually in the emission control system
I dont know but i have a 88 & i think the trans in mine is slipping. My check engine light came on
The engine computer has detected a malfunction and set a code.
It's on for a reason. It means that there is a malfunction in one of the engine control devices. Take the car to a shop and have them extract the codes, or if you want, go and get a repair manual for your car, and do the diagnostics yourself.
Look behind the engine at the center of the firewall.
Look on bottom area or engine
transmission fluid is checked with the car cooled off -never when running-(daddmac)
take the battery cable off for 15 minutes
have you checked your wires