What are the problems with Audi ttepc lights and engine fault lights and engine jitter?

What are the problems with Audi ttepc lights and engine fault lights and engine jitter?

The lighting of the fault light means that there may be a fault in the electronic throttle system, which may affect the normal use of the vehicle. Electronic adjustment of engine power (electronic throttle), usually the air intake system leaks or is blocked, the throttle has too much carbon deposit, the oil selection is not up to standard, and the valve is stuck, which will lead to the fault light. "After running two fuel tanks, the idling jitter and flameout will disappear. You can learn from it.