Most modern vehicles now use electronic throttle control systems, which are generally made up of the accelerator pedal, ETC module, and throttle body. The accelerator pedal looks the same as it always has, but its interaction with the throttle body has changed. The throttle cable has been replaced by the accelerator position sensor (APS), which detects the exact position of the pedal at any given moment, transmitting this signal to the ETC module.That means that when you step on your car’s gas pedal, instead of opening the throttle, you’re activating an accelerator pedal module, which converts the pressure you put on the pedal into an electric signal. That signal is then sent to an electronic control unit, which takes your inputs into account, as well as outside variables, to open the throttle for optimum efficiency and performance. It’s a complex system, but one that has a lot of benefits for engine wear, performance and efficiency.