My truck is 2014 D13 ENG,I got sign "poor DEF quality detected "
Could you explain about this and how I can fix this issue, thanks a lot
VOLVO DEF ISSUE
Discussion in 'Volvo Forum' started by sammaxlee, Nov 16, 2021.
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It could be a few things, but if I had to bet, it would be that you have a large chunk of crystalized def in the decomp tube and a cracked doser mounting flange. Theres a flex pipe between your DPF and SCR that has the tendency to allow DEF to dry up and restrict the ability of it to make it to the SCR. The computer has no way of knowing this, so it assumes that you have poor DEF quality. If you take that flex pipe out and clean it, it will fix the problem temporarily. There's usually a crack in the def doser mounting flange where it is welded to the bottom pan of the DPF also. There may also be upstream issues causing excessive DEF dosing, which can make the issue worse. Prime suspects are plugged EGR cooler and delta P ports.
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