How do you reset the check engine light on a 2003 Mazda MPV?

Check engine is telling you something theres problem on your engine, I hope you did not mess with your timing if not then start checking with your spark plugs, distributor cap and rotor I hope these helps you. In most cases fixing the problem makes the light go out. If you have an OBDII code reader, you can use that to clear the code(s) but the light will soon come on again if the problem is still there. It doesn't have a cap and rotor and you can't adjust the ignition timing. That same OBDII reader or a shop with one will tell you what's wrong.