Differential Pressure Feedback?
Thread Starter
|
New User
Joined: Oct 2003
Posts: 3
Likes: 0
Differential Pressure Feedback?
The check engine light came on in my 97 4.6L truck the other day. I got the code and did some reserch and found it is Differential Pressure Feedback Electronic Sensor Circuit Low Voltage. Can someone tell me what this is and what the fix is for it.
Thank you
Thank you
Posting Guru
Joined: Jun 2003
Posts: 1,823
Likes: 0
From: Houston, Texas
It sounds like there is a sensor in your diff breather line that might have some gunk in the electrical connection. Check the breather line and pull the electrical connector and spray the male end with electric motor cleaner and plug it into the female end and pull it back out. Do this a few times and let dry. Then fill the female end with dielectric grease and reinsert the male end.
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
The DPFE sensor measures EGR gas flow. It is under the hood. It could be either a faulty sensor ot the EGR ports in the intake are clogged. Look for the EGR tube coming from the drivers side exhaust up to the EGR valve. There should be two small hoses coming off of it. Follow them and they will lead you to the sensor.
To check EGR flow, apply vacuum to the egr valve while the engine is idling, if the idle drops or the engine dies, then the sensor is probably bad.
Jimmy
To check EGR flow, apply vacuum to the egr valve while the engine is idling, if the idle drops or the engine dies, then the sensor is probably bad.
Jimmy
