C001E code meaning
Right Rear Hydraulic Release Too Long
What C001E means
Set when the ABS modulator cannot release pressure at the right rear wheel within the expected time during a control cycle, completing the per-wheel set with C0012, C0016 and C001A. After commanding the right rear outlet valve to dump pressure the module expects wheel speed to recover and line pressure to fall; a release longer than the calibrated limit points to a sticking valve, a restricted hydraulic path or an accumulator or pump that cannot accept fluid. ABS and stability control are disabled and the ABS warning lamp is set. No manufacturer documents this code publicly; the release phase is covered by NHTSA's brake study, the accumulator limit by a patent on low-pressure accumulators.
C001E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor2 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C001E
- ABS warning lamp on
- ABS and stability control disabled
- Extended or firm pedal during hard braking
Common causes of C001E
- Most likelyOutlet valve sticking or slow
- PossibleRestricted hydraulic path or contaminated fluid
- Less likelyPump or accumulator cannot accept fluid
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rr ABS outlet valveHcu
What each part of C001E means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1E | The exact fault in that area. |
What to do next
- Note C001E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C001E
What does C001E mean?
C001E means "Right Rear Hydraulic Release Too Long". Set when the ABS modulator cannot release pressure at the right rear wheel within the expected time during a control cycle, completing the per-wheel set with C0012, C0016 and C001A. It is a generic code, so it means the same on every make.
Is it safe to drive with C001E?
Drive gently and only to a workshop. With C001E the car can go into limp mode (reduced power) to protect itself.
Will C001E fail an emissions test?
C001E is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C001E to fix?
Difficulty: workshop only. A typical repair takes 2 to 4 hours of work. This is a job for a workshop.
Will C001E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.