You'll get a "DEF Quality Poor" light on the dash...same as you get when it's running real low. Add as much as you can to sweeten it up. Personally, adding this system to light duty pickups and recreational vehicles is the stupidest thing the EPA has ever done.
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Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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