reset light..check engine

If it is actually the check engine light that is coming on it is a sign of a failure and a scan tool is required to retrieve the codes stored in the computer in your car. The light will stay on until the fault is cured. A scan tool is then used to reset the light.

correct the light will stay on until the fault is cured but you can reset the light another way.... and say you had bad gas or something and the fault no longer exists you can remove both the positive and negative battery cable for about 30 seconds and then reconnect and it will reset the pcm