The throttle position sensor monitors the position of the throttle in an engine to determine if extra fuel is needed to prevent the vehicle from stalling. If it fails, the vehicle will not run at desired speed since not enough fuel is being supplied to the engine. This is very dangerous especially when driving uphill or when another vehicle is following closely from behind. Auto Parts Network provides a long list of reliable throttle position sensors to help you pick one that would fit your vehicle.
Throttle Position Sensor 
