My truck will do this occasionally, between about 3/4-1/2 tank of fuel then suddenly drops, atleast its manageable if you know what it is.
Def
Discussion in 'Questions From New Drivers' started by Erjonb, May 9, 2021.
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If it derates unplug the speedsensor from the transmission. Your speedo won't work but you will get where you're going.
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SoulScream84 Thanks this.
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Try disconnecting the batteries for a few minutes. I had a similar issue and this worked to reset the system and it let me travel a few hundred miles before it did it again.
Odd thing was it ultimately appears to have been the wire going to the 7th injector (doser) was getting too hot. I noticed the wire lost it's insulation and had dropped down from its normal position along the valve cover and was laying on the side of head.
Once I reinsulated and rerouted it to a cooler location the problem has not reoccurred.
However, I don't recall that my DEF gauge was acting up.Last edited: May 9, 2021
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Cattleman84 Thanks this.
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Do a parked regen. Should take care of it.
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