Chassis, generic

C001C Right Rear Inlet Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Covers the right rear inlet (apply) solenoid valve of the ABS hydraulic modulator, the right rear counterpart of C0010 and C0018. The module closes this valve to isolate the right rear brake circuit and hold wheel pressure during ABS, traction or stability control, then opens it to reapply pressure; on the rear axle the same channel often supports electronic brake-force distribution. It monitors the coil for opens, shorts to supply or ground and resistance outside the calibrated range. A confirmed electrical fault disables ABS and stability control and lights the ABS warning lamp while base braking remains. No manufacturer documents this code publicly; the apply valve per wheel is described by NHTSA and in a pump patent.

Likely causes

Inlet valve coil open or shorted
Harness or connector corrosion
Internal hydraulic modulator fault

Symptoms

  • ABS warning lamp on
  • ABS and stability control disabled
  • Normal braking retained

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–1,700
Time1.5–4 h

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

Parts involved

rr abs inlet valve

Related codes

C001DC001EC0018

References: rosap.ntl.bts.gov, patents.google.com, en.wikipedia.org.