Back Pressure / Low Voltage
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New User
Joined: Nov 2006
Posts: 15
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From: Northwest AZ
Back Pressure / Low Voltage
I have had a code pop up this month, a low voltage back pressure code. The truck sounds like it has a jake brake on when it is started for about 5-6 seconds, and goes away. Anyone have the same problem? I am guessin it is the valve on the turbo causing a problem.
Posting Guru
Joined: Nov 2006
Posts: 1,059
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From: Herndon KY
You are correct, there is a exhaust back pressure valve on the exhaust side of the turbo on the bottom of the pipe is where the servo inputs the closure movement to the valve. There are several of us that have disconnected a wire plug where it travels underneath the intake pipe that disables the EBPV. That is how I fixed my problem. I have seen no negative reports to this action. You want to make sure that when you do this though that the valve is open cause if it is closed it hurts mileage. When I started my truck about 10 15 seconds after start it would so the old jake brake sound whooomp as the valve came on then went off, I simply disconnected the wire prior to starting and problem solved. Good luck.
