Dodge Cummins Diesel Forum - View Single Post - P0087 when half full tank only
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post #8 of (permalink) Old 06-23-2019, 09:48 PM
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Originally Posted by mikeshauling View Post
all pressures have been dealer checked. say they are good and within spec. im usually hauling a trailer when this happens though and because it calls for more fuel when i have a trailer on , thats when it happens. I went under a half tank yesterday as i was pulling in to unhook my trailer. Im off today and tomorrow so im going to see if it sets the code when im not with a trailer. hasnt set code yet but it doesnt take much pedal just to putt around town empty.
Try installing a temporary gauge to watch the lift pump pressure while going down the road. The dealer only tested it in the shop, correct ? FYI, my 07 did just that when I got down to just under 1/4 tank. I never left it go that far when I figured it.

17 3500 Laramie CCLB loaded, minus the stupid stuff.
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