If the electronic control unit is broken, it can be repaired. If ecu is found to be damaged, it must be repaired in time, otherwise it will affect the normal use of the car. Usually, the damage of ecu is caused by the damage of power port. Generally speaking, the short circuit outside the ecu will not damage the ecu, and there will be some protective measures inside the ecu, even if the internal pin is inserted incorrectly, it will not damage the ecu. At present, the protection measures of ecu are relatively perfect. Except for the fragile power port, it is not easy to be damaged elsewhere. What is easy to damage is the high voltage of ecu. Generally, the internal voltage of a family car will not exceed 15V, so it is relatively safe to use. If it's just some minor faults, it can be solved through maintenance. Generally, after ecu is damaged, the fault light on the dashboard of the car will light up, and it is easy to appear fault codes, which will lead to the phenomenon of car idling jitter, easy flameout during driving and weak acceleration. Another situation is that the mechanical part of the electronic throttle is worn, which leads to the throttle not being opened or closed correctly, and the engine is prone to jitter when idling, and the engine speed is also relatively high. Therefore, when the car has problems, it is necessary to replace or repair the ecu in time.