Hi, the ;light that comes on that looks like an engine is the check engine light. That means there are trouble codes set in one of the computers. We will need to know exactly what they are in order to continue. Most local auto parts stores will scan your system and tell you what the codes are free of charge. Just make sure you right the entire code down. It will be something like this; p0171 or 01771.
Once you have the codes come back and post to me the results and we can continue testing.