As I was driving away with A/C running, the engine died and displayed message "oil pressure low". Then, "Stop Engine". Car runs fine as long as A/C is off. Once I turn on A/C, the problem occurs.
Now Service Engine Soon light is on.
OnStar ran diagnostics and said "Power train system has detected a malfunction related to the cooling system."
Local mechanic will look at it today. On phone he said it sounds like air compressor.
It is too much of a coincidence that this happened right after oil change and new battery? What do you think? Could it be something simple that went wrong when changing oil and filter, or installing new battery?
have the same problem?
Friday, March 12th, 2010 AT 9:55 AM