2008 Star Cart - Running slow - Fault Code 25

[wtn6auva]

I have a 2008 Star 48 Volt cart that is running at half speed in forward and reverse all of a sudden. The fault code on the Curtis 1268 controller is 25. That is for "Auxiliary Coil Fault." From the Flight Systems Website this is "Missing aux (brake, relay) coil. 1. Aux coil open or not connected."

Any ideas on what this could be? If it is a brake relay, where is that located?

Could it be the speed sensor?

The batteries are 3 years old and all reading 6.4 volts.

Is there any way to reset the controller without the programmer? I am 2 hours from a dealer.

Thanks for your help!