Will a bad neutral safety switch cause vehicle to stall?

Yes, a faulty neutral safety switch can absolutely cause a vehicle to stall, especially if the switch is preventing the engine from starting when the transmission is not in park or neutral. The switch's job is to prevent the engine from starting unless the transmission is in the correct gear, a crucial safety feature. If it's malfunctioning, it might intermittently or completely fail to allow the starter to engage, leading to stalling. The problem might be more pronounced in some situations, like when shifting gears or when the vehicle is under load.