OBD Guide
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B305D

Challenge Active Circuit

B305D is an OBD-II diagnostic trouble code meaning: Challenge Active Circuit. Common causes: open circuit activation, faulty squib. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Disabling the restraint system
  • Diagnostic memory error

Causes

  • Open circuit activation
  • Faulty squib
  • Wiring harness damage
  • Poor contact in the connector
  • Airbag module malfunction

How to Fix

  1. Check activation circuit resistance
  2. Inspect the squib for damage
  3. Check the integrity of the wiring harness
  4. Clean contacts in connectors
  5. Replace faulty components

Related codes

B305CB305EB3060

Error B305D by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B305D code mean?

B305D is an OBD-II diagnostic trouble code that indicates: Challenge Active Circuit

What causes a B305D error code?

The most common causes of B305D include: Open circuit activation; Faulty squib; Wiring harness damage; Poor contact in the connector.

How do I fix a B305D diagnostic trouble code?

To fix B305D: Check activation circuit resistance. Inspect the squib for damage. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B305D?

Do not drive — repair immediately

How much does it cost to fix B305D?

The estimated repair cost for B305D is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat