The BMW 535 engine fault light appears after cleaning the throttle.

After re-checking the line in the 4S shop, the fault can be solved by initializing the throttle with a computer.

This is because when the throttle position sensor is installed back, the line is not connected properly, or when the throttle valve is not fully returned, the vehicle is started by ignition, resulting in abnormal sensor signal.

Throttle failure will lead to the cylinder is not airtight, resulting in air leakage. If the pressure in the cylinder is not enough, it is difficult to strike a fire (high voltage electricity also exists, that is, the pressure in the cylinder and the compression temperature of the mixed gas can't reach the ignition condition). In severe cases, the cooler can't touch the car, the combustion is incomplete, the locomotive has no electricity, and it can also cause fart (the exhaust pipe slams).