OBD Guide
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C05B3

Brake Booster Temperature Sensor C Circuit Low

C05B3 is an OBD-II diagnostic trouble code meaning: Brake Booster Temperature Sensor C Circuit Low. Common causes: brake booster temperature sensor malfunction, broken or damaged wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Hard brake pedal
  • Increased braking distance
  • The brake system fault indicator lights up
  • Activating emergency brake mode

Causes

  • Brake booster temperature sensor malfunction
  • Broken or damaged wiring harness
  • Short circuit in the sensor circuit
  • Problems with contacts or connectors
  • Brake booster malfunction

How to Fix

  1. Check the integrity of the wiring harness and contacts
  2. Check the resistance of the brake booster temperature sensor (circuit C)
  3. Inspect connectors for corrosion or damage
  4. If necessary, replace the temperature sensor
  5. Check the operation of the brake booster
  6. Reset the error and check if it returns

Related codes

C05B1C05B2C05B4P0571P0572

Error C05B3 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C05B3 code mean?

C05B3 is an OBD-II diagnostic trouble code that indicates: Brake Booster Temperature Sensor C Circuit Low

What causes a C05B3 error code?

The most common causes of C05B3 include: Brake booster temperature sensor malfunction; Broken or damaged wiring harness; Short circuit in the sensor circuit; Problems with contacts or connectors.

How do I fix a C05B3 diagnostic trouble code?

To fix C05B3: Check the integrity of the wiring harness and contacts. Check the resistance of the brake booster temperature sensor (circuit C). Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C05B3?

Limited driving only, diagnose soon

How much does it cost to fix C05B3?

The estimated repair cost for C05B3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat