maintenance, the fault code will be read by an OBD diagnostic scan tool to
predict what went wrong. After maintenance, the fault information will be eliminated. After clearing the fault, the fault light (MIL) will
go out. At this time, although the fault light goes out, and there is no fault
record in the fault memory, it does not mean that the fault does not exist.
after the MIL lamp alarm, even after troubleshooting through maintenance, the
MIL lamp will not be extinguished immediately, the MIL will be extinguished
indeed after the fault is eliminated after three consecutive diagnoses and no
corresponding fault is found.
is to say, only after the corresponding fault diagnosis function is re-executed
and completed, no fault can be found in the OBD system, it can show that the
fault has been repaired. Therefore, after the occurrence of fault code, the
vehicle must be timely detected and maintained, but not just simply to clear
the fault information. The fault code reader or diagnostic tool is only a
reminder and auxiliary judgment, it cannot remove faults.