Chassis, generic

C004E Brake System Pressure Control Valve Actuator Stuck

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Set when the actuator of a brake system pressure control valve does not move as commanded and appears mechanically stuck. In electronically controlled brake and stability systems a pressure control valve regulates how much hydraulic pressure reaches the wheel circuits; the module commands the valve and checks the resulting pressure against the demand. When the pressure does not change although the valve was commanded, or the valve position feedback does not follow, the module concludes the actuator is stuck by contamination, corrosion or a mechanical fault. Pressure modulation for ABS, traction and stability is lost on the affected circuit and the brake or ABS warning lamp is set while base braking remains.

Likely causes

Valve actuator stuck by contamination or wear
Corrosion or debris in the valve bore
Valve driver or wiring fault

Symptoms

  • ABS, traction and stability control disabled
  • Abnormal brake behaviour on one circuit
  • ABS or brake warning lamp on

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–2,200
Time1.5–4 h

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

Parts involved

pressure control valve

Related codes

C004DC004CC0044

References: patents.google.com, en.wikipedia.org.