Chassis, generic

C0567 Brake Booster Solenoid Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0567 flags the brake booster solenoid circuit as too low – typically a short to ground on the line between the module's high-side driver and the coil. Ford describes the check in its 2015–2019 hybrid summaries: with both high-side and low-side drivers switched off, the module measures the voltage on the solenoid supply; below 3.0 V for 380 ms the fault is stored, and Ford's hybrid powertrain module shows it as C0567 (ABS module code C0022). Because a grounded line can overload the driver, the module stops using the solenoid. Brake assist from the booster then fails and hybrids lose part of the blended braking. Look for chafed harness near the booster or water in the connector before replacing the booster.

Likely causes

Chafed solenoid wire shorting to body ground
Moisture or corrosion bridging the connector pins
Shorted solenoid winding inside the booster

Symptoms

  • Brake system warning lamp
  • No automatic brake assist
  • Less regenerative braking on hybrids

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–900
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

brake booster solenoid

Related codes

C0566C0568C0569C0022

References: fordservicecontent.com, patents.google.com.