NHTSA Complaint #11423803 — 2021 FORD E-450

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.