The engine light comes on when the vehicles computer sees a problem with the cars emission system. It doesnt mean your engine is going to blow up.Your cars computer is constantly monitoring your vehicle for proper operation from various sensors on your engine and transmission and when one of those sensors show incorrect values from some kind of a fault,the computer will turn on the ENGINE LIGHT. This is a warning for you that something is not running correct and should be brought in for a proper diagnoses.

NO. The manufacturer of your vehicle has to honor your warranty as long as you have proper documentation of the maintenance being done. As long as you have a qualified technician do it, like those at Ultimate Performance, and have all the records and your maintenance book signed, there wont be any problems.