OBD Guide
ENFRDEESPT

C05BC

Brake Booster Motor B Position Sensor Supply Circuit/Open

C05BC is an OBD-II diagnostic trouble code meaning: Brake Booster Motor B Position Sensor Supply Circuit/Open. Common causes: open or short circuit in wiring harness, brake booster motor position sensor fault b. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Increased brake pedal force
  • Brake system warning light comes on
  • Unstable operation of the brake booster

Causes

  • Open or short circuit in wiring harness
  • Brake booster motor position sensor fault B
  • Poor contact in the sensor connector
  • Malfunction of the brake system control unit

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check the contacts in the position sensor connector
  3. Replace brake booster motor position sensor B if faulty.
  4. Check the brake system control unit if necessary

Related codes

C05BAC05BBC05BD

Error C05BC by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C05BC code mean?

C05BC is an OBD-II diagnostic trouble code that indicates: Brake Booster Motor B Position Sensor Supply Circuit/Open

What causes a C05BC error code?

The most common causes of C05BC include: Open or short circuit in wiring harness; Brake booster motor position sensor fault B; Poor contact in the sensor connector; Malfunction of the brake system control unit.

How do I fix a C05BC diagnostic trouble code?

To fix C05BC: Check the wiring harness for breaks or damage. Check the contacts in the position sensor connector. Replace brake booster motor position sensor B if faulty.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C05BC?

Limited driving only, diagnose soon

How much does it cost to fix C05BC?

The estimated repair cost for C05BC is $56–222. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat