Scania fault code 40999

Code 40999 is used by 5 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMS Engine Management System SCR - Tank temperature The temperature of the reductant in the tank has been above the permitted level. Read explanation → CCU Control unit, internal fault Internal fault in the control unit. Read explanation → ACC Automatic Climate Control Control unit Internal fault. Read explanation → MCC Control unit Internal fault. Read explanation → CCC Control unit Internal fault. Read explanation →