OBD Guide
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B1B28

1st Row Driver Seat Belt Pretensioner Circuit Low

B1B28 is an OBD-II diagnostic trouble code meaning: 1st Row Driver Seat Belt Pretensioner Circuit Low. Common causes: short circuit in the circuit, broken wires. Estimated repair cost: $56–333.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Airbag light is on
  • Pretensioner does not react in an accident

Causes

  • Short circuit in the circuit
  • Broken wires
  • Incorrect squib resistance
  • SRS control unit malfunction

How to Fix

  1. Check pretensioner chain resistance
  2. Inspect the wiring harness for damage
  3. Check connection contacts
  4. If necessary, replace the pretensioner or wiring harness.
  5. Reset the error and check the system

Related codes

B1B29B1B2AB1B2B

FAQ

What does the B1B28 code mean?

B1B28 is an OBD-II diagnostic trouble code that indicates: 1st Row Driver Seat Belt Pretensioner Circuit Low

What causes a B1B28 error code?

The most common causes of B1B28 include: Short circuit in the circuit; Broken wires; Incorrect squib resistance; SRS control unit malfunction.

How do I fix a B1B28 diagnostic trouble code?

To fix B1B28: Check pretensioner chain resistance. Inspect the wiring harness for damage. Check connection contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B28?

Limited driving only, diagnose soon

How much does it cost to fix B1B28?

The estimated repair cost for B1B28 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat