CHECK ENGINE LIGHT on 2003 Chevrolet Venture

MY CHECK ENGINE LIGHT COME'S ON THEN GOSE OFF FOR NO REASON WHAT CAN IT BE ? AN IF YOU ANSWER THANK YOU THIS THING WON'T LET ME REPLY SO IF I ADD TO WHAT I HAVE ASKED THAT THE REASON

Asked by for the 2003 Chevrolet Venture
3 answers
have it scan tested for codes
auto zone will scan for free then post codes so we can adv
MARY, YOUR CHECK ENGINE LIGHT IS ON NOW? OR IT COMES AND GOES? WHEN IT IS ON, TRY TO GET TO A PARTS STORE OR SHOP THAT CAN READ YOUR CODE WITH A SCANNER AND THEN POST THE CODE HERE SO WE CAN HAVE AN IDEA WHAT IS GOING ON WITH YOUR CAR.