I got this one Mr. D. Well Mr. Ignorant what he meant by code is a our cars are able to tell us what's wrong with them as soon as they shoot the check engine light. All you have to do when the check engine light comes on is shut the car off. With the key you go back and forth like this on-off-on-off-on. Leave the key to on for that last turn and sit there and watch the check engine light blink a certain number of times. They shoot codes in pairs. Meaning the CEL blinks and about a second later it'll blink certain amount again then it'll have a long pause then they'll shoot out the second pair and the the third pair and so on. Between each pair of blinks there will be a longer than usual pause. first pair is usualy a 12 which means nothing. When the car is done it will shoot a 55 which means nothing else follows. Just go to the tech section of this page.