jgosse01

The ATC light does constantly stay on in this truck. I will check more into this thank you.

We have 9 Macks all running the same DELETE by the same person. Im just not familiar with Macks and Volvos. Ive never heard of coolant temp causing derate, normally coolant issue causes shut down to protect the engine.

Eaton 10spd, yes deleted. why would the digital display read correct temp but gauge does not???

Does anyone know what this code is "VECU 40 -4"? Does anyone have a good fuse panel diagram for this model? Runs great at idle, after driving for a couple mins it looses throttle control but stays running. I now VECU controls vehicle speed. It throws a 84-9 vehicle speed code. has brand new speed sensor. Also noticed coolant gauge goes in and out but has new temp sensor and the digital display is reading correctly. I believe it is all related to the VECU any help would be appreciated!!!