code 31 PFE????
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code 31 PFE????
I keep getting code 31. I have replaced the EVP, tested the egr and its working. So I figured it was the egr control solenoid. No go. When I start the truck right about when it drops off of high idle is when it kicks on the CEL?? The only other thing I think it would be is the PFE, but I cant seem to find anything on where exactly it is or how to test it. Looking at napa and autozone etc. online nobody even has a pfe listed.
I check fordfuelinjection.com and cant find anything there either. Any help would be great
I check fordfuelinjection.com and cant find anything there either. Any help would be great
Fleet Owner
Joined: Aug 2005
Posts: 23,666
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From: Easton,Ks
You have the Electronic EGR System.
The Electronic EGR Valve is required in EEC systems where EGR flow is controlled according to computer demands by means of an EGR Valve Position (EVP) sensor attached to the valve.
The valve is operated by a vacuum signal from the EGR-Vacuum Regulator (EVR) Solenoid (9J459) which actuates the valve diaphragm.
As supply vacuum overcomes the spring load, the diaphragm is actuated. This lifts the pintle off its seat allowing exhaust gas to recirculate (flow). The amount of flow is proportional to the pintle position. The EVP sensor mounted on the valve sends an electrical signal of its position to the Electronic Control Assembly (12A650).
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Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
The error indicates that the EGR valve was closed further than normal or EVP sensor or circuit has failed with an intermittent low voltage sometime during vehicle operation.
Possible causes:
Poor continuity in EVP harness or connectors.
Intermittent open or short in EVP sensor or harness.
Damaged EVP sensor.
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FordCigarMan
1987 - 1996 F150 & Larger F-Series Trucks
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Jun 26, 2017 08:28 AM
