i have a 2002 buick century customs and the trac light and service engine soon light keeps coming on when the car is in motion and the temp valve keeps going to hot i have already had antifreeze added to the car but it still keeps going to hot and my gear shift light is out can you tell me why these things are happening and how i can fix them. my car at some point want go more that 50 mph why is that happening
Optional Information:
2002
Buick century don't know
Already Tried:
nothing i was going to take it to a service shop