July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Accelerator Pedal Position (APP) Sensor
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
As the accelerator pedal position changes, the sensor varies the signal voltage to the PCM.