Scania fault code 8709
Code 8709 is used by 2 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
NOx sensor T131, current too low
The current measured in NOx sensor T131 is too low.
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EMU
Water valve V241, feedback signal, short circuit to voltage supply or open circuit
The control unit indicates high voltage on the valve's feedback signal.
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