What effect will the low signal of throttle sensor have on automatic transmission shifting?

When you mention a low signal, do you mean a weak signal or a low throttle opening? Let me interpret it as a low throttle opening. For automatic transmission, the basic shift strategy at present is two-parameter shift. These two parameters are vehicle speed and throttle opening, that is, vehicle speed and throttle opening are taken as abscissa and ordinate of a two-dimensional coordinate respectively, and each throttle opening corresponds to a unique vehicle speed as a shift point (upshift point or downshift point). However, according to the different throttle opening, the same speed can be shifted in advance or after the shift. Under the condition of low throttle opening, it is generally recognized as an economic mode in the industry, so a relatively low speed is generally selected for gear shifting, that is, a low throttle opening corresponds to a relatively low speed at the gear shifting point, and a high throttle opening corresponds to a high speed at the gear shifting point, for example, 8% throttle opening. If it is kept, the vehicle will shift up in turn, which may be about 40 km/h. At 100% throttle opening, the vehicle may still be in the second gear at 40 km/h. In order to highlight the excellent acceleration of the low gear, it will certainly consume more fuel to increase the speed in a short time.