Paccar, replaced egr. Still get egr failure code.

Truck had almost no boost ast and was getting egr delta pressure error code. Then it derated. Cleaned egr, didn't help. Replaced egr didn't help still get egr system failure code.

 

It's a paccar mx13. The code actually said egr valve failure detected First we cleaned the egr valve, no change. Then we replaced the egr valve, no change. When hooked back to the computer, the same code still there. That guy thought since the valve is new maybe there's an issue in the wiring somewhere. So wondering what else we need to look at, or a diagram for the wiring, connecters or whatever yo trace that stuff. Thoughts? also getting a vehicle speed sensor error under engine section, but speedo and everything works. Was told this is totally unrelated.

 

right, you said you need the chasis number? wheres the easiest place to get it?

 

Here's the plate. Couldn't get the code only what it was saying EGR valve failure detected. Cant get the guy to give me the actual code. wouldn't really talk to me cuz you know I'm just a dumb truck driver.

 

Man, wish I could but I can't even get ahold of the guy with the computer today.