C0568Brake Booster Solenoid Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0568 is the high-side counterpart of C0567: the solenoid circuit carries voltage when it should be dead. In Ford's 2015–2019 hybrid logic both drivers are commanded off and the solenoid supply line must stay near zero; more than 3.0 V for 80 ms points to a short to battery voltage or a driver that will not switch off, and the hybrid powertrain module reports C0568 (ABS code C0022). The risk is a solenoid energised without command, which would add boost the driver did not ask for, so the module blocks the function. An Aisin patent explains why that matters: energising the valve alone raises the booster output. Check for a short to a neighbouring powered wire before suspecting the module.
- What you may notice
- Brake system warning lamp
- Brake assist switched off
- Unusual pedal feel on hybrids
- Likely causes
- LikelySolenoid wire chafed against a powered circuit
- PossibleHigh-side driver in the ABS module not switching off
- RareContamination bridging pins in the solenoid connector
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.