Rear Active Purge Pump Sensor
Active Purge System is to remove the evaporative gas safely that captured in the canister. It is composed of Active Purge Pump, Front Active Purge Pump Sensor, and Rear Active Purge Pump Sensor.
Purge line flow is not enough for HEV to forge a stable purge, so it operates the Purge Pump for stable purge control.
Front Active Purge Pump Sensor, Rear Active Purge Pump Sensor monitors the smooth flow by measuring temperature/pressure of purge line.