Check engine light is on

To answer the question about the 2007 Dodge grand Caravan and 2007 Dodge Caravan they are the same The only difference is the length Grand caravans are longer So yes it will work pretty sure almost all the 2003 to 2007 A lot of parts are interchangeable if not almost all of them

Time to scan for the OBDii trouble codes. Did you buy the van with a warranty? If so, go back to the dealership that you bought it from so they can help.

Your car may or may not be Flex Fuel. If it is not FF and you put e85 in it you need to drain the gas tank.