故障码u020787表示汽车发动机缺乏动力。这个代码通常出现在发动机故障控制器中，用于监测发动机的动力状况。几种可能的 causes for this code include:1. Low fuel pressure: The engine computer may be detecting that the fuel supply is running low. This could be caused by a problem with the fuel delivery system, such as a fuel pump故障， or it could be caused by a problem with the fuel filter, such as a dirty filter.2. Over heating: The engine computer may be detecting that the engine is over heating. This could be caused by a problem with the engine management system, such as a problem with the thermostat or a problem with the air filter.3. Low oil level: The engine computer may be detecting that the oil level is low. This could be caused by a problem with the oil pump, the oil filter, or the oil level sensor.4. Engine noise: The engine computer may be detecting a problem with the engine, such as a worn out engine block or a problem with the balancer.5. Weakness in the engine: The code may also indicate a weakness in the engine itself, such as a problem with the piston rings or the cylinder walls.It is recommended to consult a mechanic to determine the root cause of the problem and to fix it as necessary.
