Chassis, generic

C001D Right Rear Outlet Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Covers the right rear outlet (release) solenoid valve of the ABS hydraulic modulator, the release counterpart to inlet valve C001C. It opens to dump brake fluid from the right rear caliper or wheel cylinder into the low-pressure accumulator so pressure can fall during an ABS or stability cycle, then closes for reapply. The module monitors the coil circuit for opens, shorts and out-of-range resistance and checks valve response. A confirmed fault disables ABS, traction and stability control and sets the ABS warning lamp while base hydraulic braking remains available. No manufacturer documents this code publicly; NHTSA's brake study and a pump patent describe the release valve that sits beside each apply valve.

Likely causes

Outlet 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 outlet valve

Related codes

C001CC001EC0019

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