Scania fault code 6657
Code 6657 is used by 5 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Water detector
The control unit could not convert the signal from the sensor for water in the fuel.
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EMD
Water detector
The control unit could not convert the signal from the sensor for water in the fuel.
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EME
Water in fuel sensor T155
The control unit cannot convert the signal from the water in fuel sensor.
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EMO
Water detector
The control unit could not convert the signal from the sensor for water in the fuel.
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MGU
CAN communication, incorrect data
Incorrect or unreliable data in the received CAN message.
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