The 3.0 displacement Touareg is less than 20,000 kilometers, and the engine fault light is on. 4s said that the oil circuit and throttle should be cleaned because there is less high-speed running, rig

The 3.0 displacement Touareg is less than 20,000 kilometers, and the engine fault light is on. 4s said that the oil circuit and throttle should be cleaned because there is less high-speed running, right? Hello, the engine fault light depends on the fault code. According to the fault code, you can determine where the problem lies. If there is too much carbon on the throttle, we will report the corresponding fault, so we need to clean the throttle and oil circuit. It's not that 20 thousand kilometers don't need cleaning. According to the actual situation, we suggest Dolara Expressway. Thank you.