What should I do if BYD's fault light is on?

Regarding the problem that the engine fault light is on, I can only help you analyze the cause of this fault because I have never seen the existing car. This problem not only needs to replace the oxygen sensor, because the main reason for the engine fault light is that the throttle valve or the engine has too much carbon deposition, which leads to the imbalance of the mixture ratio, and it is easy to cause the engine fault light to light up; If you drive at a low speed in the urban area for a long time, this phenomenon is easy to appear. If the engine is often engaged in high gear at low speed, this phenomenon also exists; It may be that the insulation layer of high-voltage line is easy to break down after aging, which leads to the engine fault light. Because the self-diagnosis system of the control unit generally does not prompt the fault code of the high-voltage line, it is difficult to find similar problems when they occur, so it is necessary to use the special diagnosis computer of the special vehicle to cooperate with experienced maintenance personnel to conduct a comprehensive inspection. In this case, it is no problem to use it for a short time, but it will lead to an increase in fuel consumption and a decrease in engine power after a long time.

It is suggested that you go to a regular 4s shop for on-site inspection according to the above analysis, and the specific cost can only be determined after inspection.

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