Scania fault code 4186
Code 4186 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMU
Refrigerant compressor E157, internal fault
The refrigeration compressor is locked.
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BMU Battery Management Unit
Propulsion battery negative contactor, number of permissible actuations exceeded
The propulsion battery's negative contactor has exceeded the number of actuations permitted.
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DDU
Switch module in the steering wheel for instrument cluster: Menu navigation, left-hand, no signal
Information is missing, update is in progress.
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