Scania fault code 8451

Code 8451 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMS Engine Management System Throttle Short circuit to battery voltage in throttle actuator. Read explanation → EMU Coolant pump M524, control signal: Open circuit The control unit reports an open circuit. Read explanation → AMS Monitors reductant delivery offset on the upstream dosing unit The dosing quantity estimated from the reductant pressure and pump and return flow does not match the requested dosing. Read explanation →