Scania fault code 5120
Code 5120 is used by 6 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
EGR valve with pneumatic control cylinder
A test shows that the minimum measured position of the EGR valve is greater than the value of the open EGR valve.
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EMD
EGR valve actuator
The EGR valve actuator is fixed in the open position or is very difficult to move.
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EME
EGR valve actuator
The EGR valve actuator is fixed in the open position or is very difficult to move.
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EMO
EGR valve actuator
The EGR valve actuator is fixed in the open position or is very difficult to move.
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COO Coordinator
Vehicle speed signal
The vehicle speed signal generated by the impulse sensor has been missing or the voltage in the impulse sensor circuit has been above or below the permitted level. Fault code is ge…
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MGU
Electric machine, calibration failed
Checking the rotor position failed when starting the MGS system.
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