bizwiz79
New Member
- Joined
- August 22, 2007
- Messages
- 3
- Reaction score
- 0
- City, State
- Central MA
- Year, Model & Trim Level
- 97 XLT
I have a 97 Explorer 5.0 AWD. I'm getting a P0401 code - Insufficient EGR flow. I know that this is usually the DPFE sensor. Therefore, I have searched the engine compartment, looked up every technical article I could find, searched every forum on the internet, and cannot get a straight answer as to where the damn thing is located.
However, after finding a few interesting articles, I have a new theory. I have read that Ford changed from a "DPFE-less" system to a DPFE in 1997. Therefore, some have a DPFE, some don't. On the ones that don't (mine), there appears to be a more upright, cylindrical unit called an EVR (Electronic Vacuum Regulator).
First of all, is this correct?
Second, would this unit cause the P0401 like the DPFE does?
Third, when looking for this sensor, I was playing with the bellow on the EGR valve, and noticed it appeared to be sticky. I have freed it up so it moves freely now. Could this have been causing the code?
Any and all help is MUCH appreciated!
However, after finding a few interesting articles, I have a new theory. I have read that Ford changed from a "DPFE-less" system to a DPFE in 1997. Therefore, some have a DPFE, some don't. On the ones that don't (mine), there appears to be a more upright, cylindrical unit called an EVR (Electronic Vacuum Regulator).
First of all, is this correct?
Second, would this unit cause the P0401 like the DPFE does?
Third, when looking for this sensor, I was playing with the bellow on the EGR valve, and noticed it appeared to be sticky. I have freed it up so it moves freely now. Could this have been causing the code?
Any and all help is MUCH appreciated!