Which god can help! Excuse me, what should I do if the engine fault light comes on after washing the nozzle? The negative electrode has been cut off! Invalid!

Hello, I'm glad to answer your question. According to the information you provided, it is necessary to check whether some sensor parts were accidentally moved when removing the fuel nozzle. Since there is a fault light on, you can read the fault code with a diagnostic instrument and analyze the cause of the fault according to the fault code. Because the negative electrode is invalid, there must be a current fault code, so we must first determine what the fault code is before we can determine the cause of the fault. Thank you.