OBD Guide
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B1C38

1st Row Driver Retractor Tensioner Circuit Low

B1C38 is an OBD-II diagnostic trouble code meaning: 1st Row Driver Retractor Tensioner Circuit Low. Common causes: open or short circuit in pretensioner wiring harness, seat belt pretensioner malfunction. 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
  • The passive safety system may not work in an emergency situation

Causes

  • Open or short circuit in pretensioner wiring harness
  • Seat belt pretensioner malfunction
  • Problems with the SRS control unit
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check connectors and contacts for corrosion
  3. Check resistance and voltage on pretensioner
  4. If necessary, replace the pretensioner or wiring harness.
  5. Reset the error and check the system operation

Related codes

B1C37B1C39B1C40

FAQ

What does the B1C38 code mean?

B1C38 is an OBD-II diagnostic trouble code that indicates: 1st Row Driver Retractor Tensioner Circuit Low

What causes a B1C38 error code?

The most common causes of B1C38 include: Open or short circuit in pretensioner wiring harness; Seat belt pretensioner malfunction; Problems with the SRS control unit; Corrosion or poor contact in connectors.

How do I fix a B1C38 diagnostic trouble code?

To fix B1C38: Check the wiring harness for breaks or damage. Check connectors and contacts for corrosion. Check resistance and voltage on pretensioner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1C38?

Do not drive — repair immediately

How much does it cost to fix B1C38?

The estimated repair cost for B1C38 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat