Is Buick Hideo throttle position 2 1 normal?

Not normal. According to the inquiry of Buick Hideo official website, the normal throttle position is 1.6 to 5.0, and 2 1 exceeds the throttle position value, which is an abnormal phenomenon. Throttle is a controllable valve that controls air to enter the engine. If it is too dirty, it will lead to idling jitter, so it should be cleaned regularly.