Engine light

It would be good to fill in your sig so everyone knows what coach you have and what motor. Have you checked the coolant level to see if it above the low sender switch just one thought.
JR

farmingdad wrote:
I told Spartan the code an they said something about relay on starter or had a open short somewhere,

"something" and "somewhere" is not a good report. You should have made notes. Without doing that, your call to them was just a waste of time.

Posting the code in your message, along with your make and model would be very helpful too. Without that information, nobody knows if they have had the same experience or not. The "check engine" light will come on for a thousand different reasons.