Es240 fault light and sideslip system light come on. Can you clean the throttle valve?

There is carbon deposit in the engine cylinder, which must be accumulated after the engine is used for a period of time. These carbon deposits themselves will lead to the change of engine design parameters, and at the same time, their properties are unstable, and the accumulation of heat will lead to disorderly ignition of the engine, which will lead to engine knocking. In this case, the engine fault light will light up.