[XIJRODIX]

I have 03 6.0L , i have a code of egr low voltage. looked at code and said low or open to dpf sensor. what is te dpf sensor and were is it? and how do i test it?

 

[AvroAero]

The DPFE is for gas engines. Unless your a 5.4er or 6.8er then its "Exhaust gas recirculation sensor A circuit high. Voltage above a specified range"

2004 Powertrain Control System Electronics Diagnostic Guide - 1994-1997 Power Stroke FAQ

 

[XIJRODIX]

406 I meant 408 and 4

I am getting two codes 408 circuit low b. and a egr position something low circuit voltage.

 

[dieselmt]

Take the trk. in & see if its a candidate for the new revised egr valve. They are prone to set this code & sometimes sets a high or low voltage code for the egr sticking closed or open & will affect the upper sensor. It usually will also set a code for egr restriction.