Scania fault code 623

Code 623 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:

COO Coordinator High range The voltage in the high range solenoid valve circuit has been low for longer than permitted. Read explanation → CUV Visibility system Internal control unit, left-hand headlamp Fault in the internal control unit in the left-hand headlamp. Read explanation → BCI Automatic fire alarm, passenger area The automatic fire alarm in the passenger area has been activated via a discrete ECU signal. Read explanation →