What can cause the check engine light to come on in a Dodge Neon?
you probably have obd codes that are coming up,,if you turn the key on and off 3 times and then leave on you will have codes come up,,,mine come up on my odometer reading,,they will show as po116,,,stuff like that,,,i found a web site that gives you discriptions of the codes and from there you will be able to tell what is wrong,,,hope this helps you