OBD Guide
ENFRDEESPT

B1BB4

Passenger Air Bag Disable Switch Circuit High

B1BB4 is an OBD-II diagnostic trouble code meaning: Passenger Air Bag Disable Switch Circuit High. Common causes: short circuit to +12v in the switch circuit, wiring harness damage. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • SRS/airbag light is on
  • The front passenger airbag does not activate in the event of an accident
  • Error message on the dashboard

Causes

  • Short circuit to +12V in the switch circuit
  • Wiring harness damage
  • Faulty airbag cut-off switch
  • Problems with the SRS module
  • Contact corrosion

How to Fix

  1. Check the position of the switch (ON/OFF)
  2. Visually inspect the wiring harness for damage.
  3. Check the continuity and resistance of the switch with a multimeter
  4. Check the voltage at the switch contacts
  5. If necessary, replace the switch or repair the harness
  6. Reset the error with a scanner

Related codes

B1BB1B1BB2B1BB3

FAQ

What does the B1BB4 code mean?

B1BB4 is an OBD-II diagnostic trouble code that indicates: Passenger Air Bag Disable Switch Circuit High

What causes a B1BB4 error code?

The most common causes of B1BB4 include: Short circuit to +12V in the switch circuit; Wiring harness damage; Faulty airbag cut-off switch; Problems with the SRS module.

How do I fix a B1BB4 diagnostic trouble code?

To fix B1BB4: Check the position of the switch (ON/OFF). Visually inspect the wiring harness for damage.. Check the continuity and resistance of the switch with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1BB4?

Limited driving only, diagnose soon

How much does it cost to fix B1BB4?

The estimated repair cost for B1BB4 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat