OBD Guide
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C055D

Brake Hydraulic Circuit B Leak

C055D is an OBD-II diagnostic trouble code meaning: Brake Hydraulic Circuit B Leak. Common causes: damage to brake lines or hoses, master cylinder malfunction. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Reduced braking performance
  • Brake warning light comes on
  • Brake fluid leak

Causes

  • Damage to brake lines or hoses
  • Master cylinder malfunction
  • Damage to brake calipers
  • Leak in brake circuit B

How to Fix

  1. Check the brake fluid level
  2. Inspect brake lines and hoses for leaks
  3. Check the master cylinder for leaks
  4. Replace damaged components
  5. Bleed the brake system

Related codes

C055EC0560C0561

Error C055D by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C055D code mean?

C055D is an OBD-II diagnostic trouble code that indicates: Brake Hydraulic Circuit B Leak

What causes a C055D error code?

The most common causes of C055D include: Damage to brake lines or hoses; Master cylinder malfunction; Damage to brake calipers; Leak in brake circuit B.

How do I fix a C055D diagnostic trouble code?

To fix C055D: Check the brake fluid level. Inspect brake lines and hoses for leaks. Check the master cylinder for leaks. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C055D?

Yes, but get it checked soon

How much does it cost to fix C055D?

The estimated repair cost for C055D is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat