08 diesel Jetta doesn't work after fire. What happened? The computer detected a short circuit in the throttle. Can it be repaired?

The throttle valve is temporarily closed when the engine is turned off to prevent the engine from shaking when the engine is turned off, and it is open at other times. Check cylinder pressure and high-pressure pump!

Throttle cleaning, the general repairman thinks that your car is a carburetor, and the jargon of EFI is to clean the throttle valve body. Under normal circumstances, there will be no major problems, mainly because the cleaning is not in place. Secondly, if the car is old, check the throttle.