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P20C7 Reductant Heater “D” Control Circuit Low P20C8 Reductant Heater “D” Control Circuit High P20CB Exhaust Aftertreatment Fuel Injector “A” Control Circuit/Open P20CC Exhaust Aftertreatment Fuel Injector “A” Control Performance P20CD Exhaust Aftertreatment Fuel Injector “A” Control Circuit Low P20CE Exhaust Aftertreatment Fuel Injector “A” Control Circuit High P20CF Exhaust Aftertreatment Fuel Injector “A” Stuck Open P20D0 Exhaust Aftertreatment Fuel Injector “A” Stuck Closed P20D1 Exhaust Aftertreatment Fuel Injector “B” Control Circuit/Open P20D2 Exhaust Aftertreatment Fuel Injector “B” Control Performance P20D3 Exhaust Aftertreatment Fuel Injector “B” Control Circuit Low P20D4 Exhaust Aftertreatment Fuel Injector “B” Control Circuit High P20D5 Exhaust Aftertreatment Fuel Injector “B” Stuck Open P20D6 Exhaust Aftertreatment Fuel Injector “B” Stuck Closed P20D7 Exhaust Aftertreatment Fuel Supply Control Circuit/Open P20D8 Exhaust Aftertreatment Fuel Supply Control Performance P20D9 Exhaust Aftertreatment Fuel Supply Control Circuit Low P20DA Exhaust Aftertreatment Fuel Supply Control Circuit High P20DB Exhaust Aftertreatment Fuel Supply Control Stuck Open P20DC Exhaust Aftertreatment Fuel Supply Control Stuck Closed P20DD Exhaust Aftertreatment Fuel Pressure Sensor Circuit P20DE Exhaust Aftertreatment Fuel Pressure Sensor Circuit Range/Performance P20DF Exhaust Aftertreatment Fuel Pressure Sensor Circuit Low P20E0 Exhaust Aftertreatment Fuel Pressure Sensor Circuit High P20E1 Exhaust Aftertreatment Fuel Pressure Sensor Circuit Intermittent/Erratic P20E6 Reductant Injection Air Pressure Too Low P20E7 Reductant Injection Air Pressure Too High P20EC SCR NOx Catalyst – Over Temperature Bank 1 P20ED SCR NOx Prealyst – Over Temperature Bank 1 P20EE SCR NOx Catalyst Efficiency Below Threshold Bank 1

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