OBD Guide
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B181B

Open in Passenger Side Airbag Variable Vent Hole Squib Circuit

B181B is an OBD-II diagnostic trouble code meaning: Open in Passenger Side Airbag Variable Vent Hole Squib Circuit. Common causes: broken wires in the passive safety system harness, poor contact in connectors. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag malfunction indicator light is on
  • The passive safety system may not work in an accident.

Causes

  • Broken wires in the passive safety system harness
  • Poor contact in connectors
  • Squib malfunction
  • Damage to the airbag control unit

How to Fix

  1. Diagnostics using an OBD-II scanner to confirm the code
  2. Checking the integrity of the wiring harness and contacts
  3. Replacing damaged wires or connectors
  4. Checking and replacing a faulty squib
  5. Resetting the error and testing the system

Related codes

B181AB181CB1800

FAQ

What does the B181B code mean?

B181B is an OBD-II diagnostic trouble code that indicates: Open in Passenger Side Airbag Variable Vent Hole Squib Circuit

What causes a B181B error code?

The most common causes of B181B include: Broken wires in the passive safety system harness; Poor contact in connectors; Squib malfunction; Damage to the airbag control unit.

How do I fix a B181B diagnostic trouble code?

To fix B181B: Diagnostics using an OBD-II scanner to confirm the code. Checking the integrity of the wiring harness and contacts. Replacing damaged wires or connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B181B?

Do not drive — repair immediately

How much does it cost to fix B181B?

The estimated repair cost for B181B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat