i have a 1999 2500 dodge diesel that has throttle problems. the engine will throttle down to idle

[charles fuller]

the throttle all of a sudden will go to idle and engine light will come on. I have had the throttle sensor replaced. If I pull off the road, turn the engine off then on. The throttle works. Anyone have ideas. I need help. Thanks

 

[EDankievitch]

You need to pull the codes. When the dealer screwed up my 2002 it would that very issue. Engine would just idle and light up the CEL lamp. I forget what codes would come up but there was always a bunch of codes. After a bunch of Injection pumps I finally got the dealer to take the truck back. Was a bad summer.

 

[Joseph Donnelly]

Did you replace the APPS (accelerator pedal position sensor) and perform the "learn" routine on it?

 

[HHhuntitall]

From my experience, sounds like fuel delivery, wiring/ground issures, APPS, or injection pump failure. That issue is usually an injection pump failure, but not always.... gotta diagnose it and work your way through....