OBD Guide
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C012F

Brake Boost Solenoid Valve Circuit Malfunction

C012F is an OBD-II diagnostic trouble code meaning: Brake Boost Solenoid Valve Circuit Malfunction. Common causes: brake booster solenoid valve malfunction, open or short circuit in valve wiring harness. Estimated repair cost: $33–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–278 (est.)

Symptoms

  • Stiff brake pedal, increased force required to brake
  • The brake warning light on the dashboard is on
  • Increased braking distance
  • Extraneous sounds when the brake booster operates
  • ABS or ESP light is on

Causes

  • Brake booster solenoid valve malfunction
  • Open or short circuit in valve wiring harness
  • Oxidation or damage to the solenoid connector
  • Malfunction of the brake system control unit
  • Vacuum leak in the amplifier system

How to Fix

  1. Carry out diagnostics with a scanner that supports the brake system.
  2. Check the brake booster solenoid valve with a multimeter (winding resistance)
  3. Inspect the wiring and solenoid connector for damage and oxidation.
  4. Check for vacuum in the amplifier system
  5. Replace faulty solenoid or repair wiring
  6. After repair, reset the error and perform a test drive

Related codes

C0110C0120C0121C0135

Error C012F by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C012F code mean?

C012F is an OBD-II diagnostic trouble code that indicates: Brake Boost Solenoid Valve Circuit Malfunction

What causes a C012F error code?

The most common causes of C012F include: Brake booster solenoid valve malfunction; Open or short circuit in valve wiring harness; Oxidation or damage to the solenoid connector; Malfunction of the brake system control unit.

How do I fix a C012F diagnostic trouble code?

To fix C012F: Carry out diagnostics with a scanner that supports the brake system.. Check the brake booster solenoid valve with a multimeter (winding resistance). Inspect the wiring and solenoid connector for damage and oxidation.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C012F?

Limited driving only, diagnose soon

How much does it cost to fix C012F?

The estimated repair cost for C012F is $33–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat