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15 ctd CEL P21DD

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Well add me to the list of emission issues. 44500 miles. P21DD assume that is the DEF tank heater issue. My DEF level is 18%. Kinda sucks, have to travel to Chicago on Monday, guess I will drive a rental car. Think they want to do the recall of the recall whatever that is.
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· Premium Member
2,608 Posts
Glad your car is back Indy.

Hey, at what point does DIC reading for DEF change from “OK” to a percentage? When I got the car in March it was reading a percentage. But ever since I dumped 2.5 gallon DEF in it just says “OK”.
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