C055E code meaning
Brake Hydraulic Circuit A Leak
Chassis system Generic code C05xx codes Check engine light
What C055E means
C055E reports a leak in hydraulic circuit A, the counterpart of C055D. Land Rover documents it on the Defender L663 from 2020 as C055E-7A, meaning lost fluid or a failed seal, with amber ABS and DSC lamps. By design the code survives a simple clear: after the repair the ignition is cycled until the car sleeps, switched on again, left 15 s without touching the pedal, then the pedal is held firmly for up to 120 s while the valves click through a self-check (SSM 74988). If lamps stay lit, the leak is still there. GM's 2025 EBCM tables list C055E for the second circuit with the same leakage limits as C055D and Type A MIL. Driving on is risky, because only one circuit may be braking.
C055E at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C055E
- Amber ABS and DSC/ESC lamps, possibly red brake warning
- Longer pedal travel or spongy feel
- Warning returns after clearing until the self-check passes
Common causes of C055E
- Most likelyFluid escaping from a line, hose, union or caliper of circuit A
- PossibleInternal seal failure in master cylinder or hydraulic unit
- PossibleRepair done but the required self-check was not completed, so the code stays
- Less likelyAir trapped after bleeding or component replacement
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake circuit aABS hydraulic unit
What each part of C055E means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5E | The exact fault in that area. |
What to do next
- Note C055E 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 C055E
What does C055E mean?
C055E means "Brake Hydraulic Circuit A Leak". C055E reports a leak in hydraulic circuit A, the counterpart of C055D. It is a generic code, so it means the same on every make.
Is it safe to drive with C055E?
Drive gently and only to a workshop. With C055E the car can go into limp mode (reduced power) to protect itself.
Will C055E fail an emissions test?
C055E 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 C055E to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C055E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.