2021 FORD E-450 Vehicle Speed Control Problems

Component= Traction control and cruise control. Safety risk=Driving a Ford e-450 Class C RV on interstate at 63 MPH going generally up hill with cruise control on, the "Service AdvanceTrac" warning light came on dashboard. I Immediately lost cruise control capability and steering became a little shakey. Pulled into rest area shut vehicle off. A few minutes and started again. Error went away and cruise control was functioning. Happened again a few hours later and I did the same thing and continued on. What happened=As I was driving, the " Service Advance Traction" light came on and the cruise control stopped, my class c rv immediately slowed at a high rate, a semi was behind me trying to get over to the middle lane. When I slowed down suddenly due to the cruise control going out, the semi had no choice but to change lanes quickly missing the back of...

The Service Advance Trac light comes on sporadically. This also triggers the Cruise Control and Hill Start Assist to turn off. Any of these malfunctions could prove to be a safety issue particularly with regard to stability and control of the vehicle. The vehicle has not yet been to a dealer for these issues as we are traveling. The malfunction has occurred about 5-6 times while driving, without any particular triggers.There were no early warnings and the first time the service light came on was June 18th and we were on a two lane flat road doing about 50 mph. The Advance Trac (and cruise/Hill Start) remains non-functional until vehicle is turned off for at least 10 minutes. It then often resets and performs normally until the next failure - which does not seem to be predictable.

SERVICE ADVANCE TRAC KEEPS FAULTING AND DISABLING THE CRUISE CONTROL, ABS BRAKING, HILL HOLDER, AND SKID CONTROL FUNCTIONS, SEEMS TO OCCUR AT HIGHWAY SPEEDS WITH CROSSWIND