OBD Guide
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B0073

Second Row Left Seat Belt Pretensioner Deployment Control

B0073 is an OBD-II diagnostic trouble code meaning: Second Row Left Seat Belt Pretensioner Deployment Control. Common causes: open or poor contact in the pretensioner wiring harness, faulty belt pretensioner squib. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • The passive safety system fault lamp (SRS/Airbag) is on or flashing.
  • Security error message on display
  • The seat belt pretensioner does not operate during testing (diagnosis)

Causes

  • Open or poor contact in the pretensioner wiring harness
  • Faulty belt pretensioner squib
  • Short circuit to ground or to power
  • Malfunction of the SRS control unit itself
  • Corroded or damaged electrical connectors

How to Fix

  1. Conduct a visual inspection of the wiring harness and connectors for damage and corrosion.
  2. Check the resistance and continuity of the pretensioner squib circuit using a multimeter
  3. If a break or short circuit is detected, repair or replace the damaged section of the harness
  4. If the squib is faulty, replace the seat belt pretensioner assembly.
  5. Clear error codes from the SRS control unit memory and check if the fault returns

Related codes

B0070B0071B0072B0074B0075

Error B0073 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the B0073 code mean?

B0073 is an OBD-II diagnostic trouble code that indicates: Second Row Left Seat Belt Pretensioner Deployment Control

What causes a B0073 error code?

The most common causes of B0073 include: Open or poor contact in the pretensioner wiring harness; Faulty belt pretensioner squib; Short circuit to ground or to power; Malfunction of the SRS control unit itself.

How do I fix a B0073 diagnostic trouble code?

To fix B0073: Conduct a visual inspection of the wiring harness and connectors for damage and corrosion.. Check the resistance and continuity of the pretensioner squib circuit using a multimeter. If a break or short circuit is detected, repair or replace the damaged section of the harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B0073?

Do not drive — repair immediately

How much does it cost to fix B0073?

The estimated repair cost for B0073 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat