•I was driving the truck from Houston to Dallas. I got a warning on the dash of reduced power and the check engine light came on. •Safety was somewhat of a concern because of reduced power while on the highway. Being able to get to my destination was in question as was keeping up with traffic. •The dealer quickly diagnosed the issue as a a failure of the CP4 high pressure fuel pump. This is a known and widespread issue with this truck and engine. •Truck has been inspected by the dealership. •There was no warning until the failure itself.