OBD Guide
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B1B04

Driver Airbag Squib 2 Circuit Low

B1B04 is an OBD-II diagnostic trouble code meaning: Driver Airbag Squib 2 Circuit Low. Common causes: short circuit in the squib circuit, broken or damaged wiring harness. 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 can be disabled

Causes

  • Short circuit in the squib circuit
  • Broken or damaged wiring harness
  • Squib malfunction
  • Problems with the airbag module

How to Fix

  1. Check the resistance of the squib circuit
  2. Inspect the wiring harness for damage
  3. Check the condition of the squib
  4. Replace damaged components
  5. Reset the error and check the system

Related codes

B1B03B1B05B1B06

FAQ

What does the B1B04 code mean?

B1B04 is an OBD-II diagnostic trouble code that indicates: Driver Airbag Squib 2 Circuit Low

What causes a B1B04 error code?

The most common causes of B1B04 include: Short circuit in the squib circuit; Broken or damaged wiring harness; Squib malfunction; Problems with the airbag module.

How do I fix a B1B04 diagnostic trouble code?

To fix B1B04: Check the resistance of the squib circuit. Inspect the wiring harness for damage. Check the condition of the squib. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B04?

Do not drive — repair immediately

How much does it cost to fix B1B04?

The estimated repair cost for B1B04 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat