OBD Guide
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B1C39

1st Row Driver Retractor Tensioner Circuit High

B1C39 is an OBD-II diagnostic trouble code meaning: 1st Row Driver Retractor Tensioner Circuit High. Common causes: broken or damaged wiring harness, high resistance in the circuit. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • Seat belt does not tighten in an accident
  • Error in diagnostic system

Causes

  • Broken or damaged wiring harness
  • High resistance in the circuit
  • Seat belt pretensioner malfunction
  • Problems with contacts in connectors

How to Fix

  1. Check wiring harness for damage
  2. Measure the resistance in the pretensioner circuit
  3. Check contacts in connectors
  4. Replace seat belt pretensioner if necessary
  5. Reset the error and check the system

Related codes

B1C38B1C40B1C41

FAQ

What does the B1C39 code mean?

B1C39 is an OBD-II diagnostic trouble code that indicates: 1st Row Driver Retractor Tensioner Circuit High

What causes a B1C39 error code?

The most common causes of B1C39 include: Broken or damaged wiring harness; High resistance in the circuit; Seat belt pretensioner malfunction; Problems with contacts in connectors.

How do I fix a B1C39 diagnostic trouble code?

To fix B1C39: Check wiring harness for damage. Measure the resistance in the pretensioner circuit. Check contacts in connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1C39?

Limited driving only, diagnose soon

How much does it cost to fix B1C39?

The estimated repair cost for B1C39 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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