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P20B9 Code 2020 2500
My 2020 2500 has around 6800 miles on it. Check engine light came on and it threw code P20B9. Did not derate or anything and ran fine until the dealer could get it in about a week later. Service advisor says it needs a DEF “tube?” heater and pump due to excessive crystallization in bottom of...- Gixxerman88
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