Scania fault code 4578
Code 4578 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Cylinder 3
Multiplicative fuel adaptation has reached its lower limit.
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EMD
Cylinder 3
Cylinder 3 is generating an incorrect torque. The diagnosis is only activated at high load.
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EME
Cylinder 3
Cylinder 3 generates an incorrect torque. The diagnosis is only activated at high load.
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EMO
Cylinder 3 torque error
The engine speed signal is expected to behave in a certain way when a combustion occurs. If the cylinders contribution to engine torque is larger than expected a fault code is set.…
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