July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Rail Pressure Sensor (RPS): Specifications: Specification

WARNING: This page is about a different car, the 2016 Hyundai Elantra GT and 2015 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Output Voltage - Pressure Graph

Courtesy of HYUNDAI MOTOR AMERICA