DTC P0559: Brake Booster Pressure Sensor Circuit Intermittent: Action
WARNING: This page is about a different car, the 2017 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
This DTC sets if the information in the brake booster vacuum sensor message is outside of the programmed set of parameters. This is most likely due to vacuum sensor concerns, wiring harness concerns or vehicle communication concerns. RETRIEVE and DIAGNOSE all ABS module DTCs. Go to the ABS - Antilock braking system .