NHTSA Complaint #11632513 — 2022 FORD F-450 SD

The vehicles DEF system malfunctioning issue causes a warning to illuminate on the dash stating the “Speed Will Be Limited To 50 MPH in 50 Miles” but the DEF Fluid is and was in fact near full or full. When this incident happened I did not stop after the 50 miles had lapsed and the vehicle eventually began to slow down on I-80 going Westbound and caused numerous of vehicles(Cars, Trucks, Semis) to be forced to go around me to avoid hitting my vehicle where I was pulling an RV. In order to reset the system I had to pull to the side of the road where there was barely a shoulder to pull over to and turn my vehicle off then wait for some time then restart the vehicle. Road traveling conditions on I-80 is 80 MPH and this issued raised a tremendous safety concern for me. The issue has been ongoing since winter 2023. I brought this to the dealership attention because there is some sort of system/computer issue but they blamed it on my batteries. Then it happened to my neighbor and he has a 2019 Ford F-350 SuperDuty 6.7L Powerstroke Diesel with new batteries.