OBD Guide
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B1B1B

Left Side Curtain Squib 1 Circuit Shorted Together

B1B1B is an OBD-II diagnostic trouble code meaning: Left Side Curtain Squib 1 Circuit Shorted Together. Common causes: wiring damage, squib 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 does not work
  • Error B1B1B in diagnostic memory

Causes

  • Wiring damage
  • Squib malfunction
  • Short circuit in the circuit
  • Problems with the control module

How to Fix

  1. Check the integrity of the wiring harness
  2. Measure the resistance of the squib
  3. Check contacts and connectors
  4. Replace squib or wiring harness if necessary
  5. Reflash or replace the control module

Related codes

B1B1AB1B1CB1B1D

FAQ

What does the B1B1B code mean?

B1B1B is an OBD-II diagnostic trouble code that indicates: Left Side Curtain Squib 1 Circuit Shorted Together

What causes a B1B1B error code?

The most common causes of B1B1B include: Wiring damage; Squib malfunction; Short circuit in the circuit; Problems with the control module.

How do I fix a B1B1B diagnostic trouble code?

To fix B1B1B: Check the integrity of the wiring harness. Measure the resistance of the squib. Check contacts and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B1B?

Do not drive — repair immediately

How much does it cost to fix B1B1B?

The estimated repair cost for B1B1B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat