C001DRight Rear Outlet Control
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- ABS warning lamp on
- ABS and stability control disabled
- Normal braking retained
- Likely causes
- LikelyOutlet valve coil open or shorted
- PossibleHarness or connector corrosion
- RareInternal hydraulic modulator fault
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €300 – €1,700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.