What is the reason why the speed of the truck can't go up once the accelerator is stepped on?

It is the computer speed limit of the original car that the truck can't step on the bottom speed. It is normal for many car dealers to step on the bottom speed when idling. If the truck can't step on the bottom speed when driving, it may be that the sensor is out of order. The truck throttle can't step on the bottom speed, and the throttle position sensor can't send a signal to the computer, which is the speed limit of the original car computer. When the truck is running, it may be caused by sensor failure, or scheduling failure, exhaust pipe blockage, valve position sensor distortion, manifold air leakage and other reasons. Million car purchase subsidy