Scania fault code 8705
Code 8705 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Charge air pressure sensor
The NOx sensor shows low electricity (internal fault) or EMS shows a disruption in the signal has occurred.
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EMU
Water valve V243, feedback signal, short circuit to voltage supply
The control unit indicates high voltage on the water valve's feedback signal.
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EEC Exhaust Emission Control
NOx sensor downstream of the SCR catalytic converter
NOx sensor T115 downstream of the catalytic converter has not started within the expected time.
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