L5P TSB (service bulletins, recalls, updates)
So, I've had my 2018 in and out of the dealer for the last 2 months. First, it was DEF Heater 2 failing. Then it was DEF heater 1 failing. After that, it was the NOX sensor. Now, it's throwing another code P20B9 (reductant heater 1 control circuit). Which has been replaced TWICE now.
I feel...