Lifan 620 Maintenance Manual page 179

DTC C1 604
ECU internal circuit and valve coil
Cause
faults
Elimination
procedure
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Table 3-15
Note: If faults corresponding to more than 2 DTC can be
confirmed, delete the DTC (that can be deleted), drive the
vehicle at a speed of over 40 km/h, confirm the fault
corresponding to this DTC again and refer to the recorded
DTC (and confirm the same fault code).
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