hey i have a beautiful 89 lac deville (sedan) and i have had the service engine light since i've had the car. though it does not effect the performane i've just ignored it, but that bright azz light is getting to me. it only comes on after i have drove the car for about a half hour str8. if i just runs around town on short runs it wont come on. i ran the OBD and it gave me three codes back : E13, E59, and F48 does anybody have any idea what these codes mean. if so please reply before i take out the bulb, lol
thanks, Dre.

Would service air conditioning also be on? F48 is low refrigerant. E13 is Oxygen sensor not ready, and E59 is for the transmission input speed sensor. Hope this helps!