Scania fault code 4378
Code 4378 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
BMU Battery Management Unit
Battery module 10, electrical fault
The cell monitoring circuit board has detected faults in the electrical cable that connects to the individual battery cells.
Read explanation →
DDU
GMSL link in interactive driver display, open circuit
Information is missing, update is in progress.
Read explanation →
AMS
Reductant pump, open circuit or short circuit
Fault in the reductant pump control and voltage supply circuit.
Read explanation →
EEC Exhaust Emission Control
Reductant pump, open circuit or short circuit
Fault in the reductant pump control and voltage supply circuit.
Read explanation →