Touareg Diesel Throttle Control No Signal

There is no signal from the throttle control unit because there is black deposit on the inner wall of the throttle throat.

There is no signal from the throttle control unit because there is black deposit on the inner wall of the throttle throat, which leads to insufficient air intake in the engine combustion chamber or accidental seizure of the butterfly valve at idle speed. The solution is to clean the throttle. When cleaning, the throttle should be removed from the engine intake pipe and the side near the engine should be cleaned. Use a cleaning agent that is non-corrosive to metals to ensure that there is no black deposit left on the inner wall surface of the throttle throat after cleaning. After cleaning, put the throttle back to the engine, clear the fault code, and continuously track the 5000km non-repeated fault report to eliminate the fault.