An electronic throttle body, or ETB, is a throttle body that looks and functions much like previous iterations of the throttle body, with one exception – a small electric motor the takes the place of a mechanical linkage.
The electric motor, in response to commands received from either the engine control module or powertrain control module, is what opens and closes the throttle plate inside the throttle body. The only thing connected to an ETB is wires.
A failing electronic throttle body can lead to decreased power, poor fuel economy and poor drivability. Exposure to moisture, oil and extreme underhood temperatures are some of the factors that can cause an ETB to fail prematurely. Some throttle bodies also contain mechanical position sensors that physically wear out.
This video is sponsored by The Pronto Network.