Scania fault code 4212
Code 4212 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Outdoor temperature sensor 1 T27 or outdoor temperature sensor 2 T163
The difference between the outdoor temperature sensors is too great.
Read explanation →
EMU
Refrigerant compressor E158, internal fault
One or more CAN messages are missing from control unit E159.
Read explanation →
BMU Battery Management Unit
Cell monitoring circuit board, internal fault
An electrical fault has been detected in the cell monitoring circuit board. The fault may concern one or more circuit boards.
Read explanation →
DDU
External amplifier, channel 4, break in the circuit
The DDU control unit has measured a voltage that indicates a break in the circuit.
Read explanation →