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  1. D

    U02A2 - Lost communication with Reductant Quality Module

    Hi, new member here. I was on a business trip when I got the dreaded "Service DEF System See Dealer" message. I was in a remote location on the Oregon coast and the only dealer around was booked for 2 months. I had a code reader and was able to clear the codes a couple of times, but then I got...
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