Smith Farms Posted June 21, 2019 Share Posted June 21, 2019 (edited) My truck is at dealership for oil temp problem and on there 22 point inspection there telling the R&R dosing valve is bad on the def system. About a $1200 repair. Truck has 425000 miles on it and was not throwing a code for this problem. Is this a common repair? Edited June 21, 2019 by Smith Farms Quote Link to comment https://www.bigmacktrucks.com/topic/57778-def-system-issue/ Share on other sites More sharing options...
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