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Severity: High Code type: Manufacturer-specific (Toyota)

Toyota B0111 Code: Open in Side Squib (RH) Circuit

The airbag computer sees a break in the firing circuit of the right front seat's side airbag.

Safety first · Consult a professional

  • Airbag (SRS) circuits must only be serviced by a professional. Never probe airbag connectors — accidental deployment causes serious injury.

At a glance

Severity: 4/5 – High4/5

Severity: High

Meaning
Open in Side Squib (RH) Circuit
System
Body Systems · Body
Safe to drive?
With caution
Typical repair cost
$80–$1,300
DIY difficulty
Professional only

Toyota's front seat side airbags sit in the outer edge of each seatback, and the center airbag sensor (the SRS computer) checks each igniter loop with a small test current. B0111 (blink code 44 on older models) means the loop to the right-hand seat's side airbag reads open, as if a wire or connector were broken. On US and European left-hand-drive cars that is the front passenger seat; on right-hand-drive cars it is the driver's seat. Because the wiring runs from the floor harness to a connector under the seat and moves every time the seat slides, a disturbed or damaged under-seat connection is the usual cause, well ahead of a failed airbag. The system typically turns on the SRS warning and that side airbag may not deploy in a crash.

How to read B0111

How to read B0111B10213114
  1. B Body
  2. 0 Generic (SAE)
  3. 1 Body Systems
  4. 11 Specific fault

Symptoms

  • SRS/airbag warning light on steadily or flashing
  • Light came on after the right front seat was moved, removed or cleaned under
  • Warning appears or disappears when the seat slides or someone sits down hard
  • Often after seat cover, seat heater or car audio work under the seat
  • B0116 (left side) may be stored too if both seats share the problem

Possible causes

Ranked by how often each cause is behind this code (editorial estimate).

  1. Under-seat side airbag connector loose, partly unlatched or corroded 36%
  2. Floor or seat harness chafed or pulled by the seat track or objects under the seat 26%
  3. Faulty side airbag module (igniter) in the seatback 16%
  4. Seat removed or replaced and not reconnected correctly 12%
  5. Center airbag sensor (SRS computer) fault 6%
  6. Instrument panel or floor wiring fault between the SRS computer and the seat 4%

Diagnosis step by step

Diagnostic flow: B01111Read SRS codes with a capable scantool2Think about recent seat work3Look, don't touch4How the shop checks the circuit5Repair, clear and verify

  1. Read SRS codes with a capable scan tool

    Generic OBD readers usually can't see airbag codes. A Toyota-capable tool shows B0111 and whether other side or curtain codes are stored. Don't clear it before the repair.

    Tools: OBD-II scanner

  2. Think about recent seat work

    Seat removal, carpet cleaning, lost items fished out from under the seat, or aftermarket seat covers are the most common triggers. Tell the shop, as it often saves diagnostic time.

  3. Look, don't touch

    With a flashlight, look under the right front seat for a harness that's pinched in the seat track or a connector that's visibly hanging loose. Don't unplug or probe it yourself; handling SRS connectors with power available can fire the airbag.

    Tools: Flashlight

  4. How the shop checks the circuit

    The technician switches off, disconnects the battery negative and waits at least 90 seconds for the SRS backup power to drain. The side airbag is then replaced by a service wire or load tool to see whether the fault is in the airbag or in the wiring, harness and SRS computer.

    Tools: OBD-II scanner

  5. Repair, clear and verify

    After the connector, harness section or airbag is repaired, the code is cleared with the scan tool and the SRS light must do its bulb check at start-up and then go out. Moving the seat through its full range confirms an intermittent fault is gone.

    Tools: OBD-II scanner

Repair options & costs

RepairDIY?Estimated cost
SRS diagnosis No $100–$200
Reseat or repair under-seat side airbag connector No $80–$250
Seat or floor harness section repair No $200–$550
Replace front seat side airbag module No $450–$1,100
Replace center airbag sensor (SRS computer) No $500–$1,300

Rough US estimates for parts and labor; shop rates vary by region. Not a quote.

Notes by brand

Toyota

On some Sienna model years, open side-squib codes on the right (B0111) or left (B0116) became a known pattern linked to the floor wire harness near the seats. Toyota issued repair guidance, and SRS parts may be covered by warranty, so ask a dealer before paying.

Emissions / smog test impact

Depends

B0111 doesn't matter for the emissions part of a US inspection. States with a safety inspection can fail a car whose airbag warning light stays on.

Frequently asked questions

Is the right side airbag on the passenger or driver side?

Toyota names the side airbags by seat position: RH is the right-hand front seat. On US and European cars that's the passenger seat; on right-hand-drive cars it's the driver's seat.

Can I just push the connector under the seat back together?

It's not recommended. The system stays powered for a short while after the battery is disconnected, and handling squib connectors can deploy the airbag. A shop follows the disconnect and wait procedure and confirms the fault with the right tools.

Will the airbag light go off by itself after the connector is fixed?

Usually not. Toyota SRS codes for a current fault need to be cleared with a scan tool after the repair; the light should then do its normal check and go out.

Why does the light flash instead of staying on?

On many older Toyotas the SRS light shows stored codes as blink patterns, and B0111 is blink code 44. A flashing light is still a fault warning, not a harmless reminder.

Sources