If you get the check engine light to come on, you should check the codes. Whatever code you tripped is stored in the ECU and finding out what it is, is really simple to do.
On the engine bay/trunk firewall there is a little grey box that says DIAGNOSTICS on top of it. It is on the passenger side of the car and it is only 1"x2" or so.
Pop open that little box.
Inside the roof of the box is a little diagram.
Use that to locate the pins for
E1 and TE1
You need to jumped those two ... a paper clip unbent works fine (or a small piece of wire).
Just stick each end into each of those ports.
Chances are good those ports look gunky and it does not feel like you are really pushing into anything ... but this will work ~ I promise
If you did it right, when you turn the key on (you do not have to start the car) ... the check engine light will start flashing in code.
It is possible that you will have stored more than one code!
It will keep cycling thorugh them.
Watch the flashes and learn the pace. 5 flashes, small pause, 2 flashes, long pause, 5 flashes, short pause, 2 flashes, long pause, etc ...
That would be one code and it is code 52. The long pause is the break between flashes. The short pause is the break between digits.
Code 52 is the knock sensor ... it is one of the most common codes to get.