Scania fault code 4871

Code 4871 is used by 2 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMS Engine Management System Rotational speed sensor The signal from the engine speed sensor has been incorrect from the beginning. Read explanation → AMS V231, Reductant doser downstream of the turbocharger shorted to high supply voltage. The control unit for the exhaust gas aftertreatment system indicates that the pins for the reductant doser after turbocharger are shorted to high supply voltage. Read explanation →