code P1391
Thread Starter
|
New User
Joined: Feb 2008
Posts: 1
Likes: 0
code P1391
The "SES" light came on and I scanned my 99' PSD with my code reader.The P1391 describes a low input to bank 1 GP circuit. Is bank 1 passenger or drivers side, first of all? I replaced the GP's on the passenger side, the GPRelay with a Stancor, new Batteries. Every change and the damn light still comes on. There was good continuity to the UVC harness when I checked the passenger side while the valve cover was off. The "SES" light still comes on. Truck starts fine, no smoke, but the light means something ain't right, and it won't clear without coming back on....any ideas.? also, some research on the internet said that a voltage below .66V shunt signal will send this code. What is a shunt signal?
Thread
Thread Starter
Forum
Replies
Last Post
Gooseguy84
1999 - 2003 7.3L Power Stroke Diesel
8
Jun 15, 2012 03:21 PM
Crewcab Turbo
1999 - 2003 7.3L Power Stroke Diesel
2
Jan 19, 2012 01:33 PM
