B1C29: Left side seat thorax airbag squib 1 circuit open (Dodge)

Left seat side airbag circuit open

Severity: Inspect soon

An open side airbag squib circuit means that airbag may not fire, and the airbag lamp is on.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

B1C29 in short

On Dodge, B1C29 means the airbag computer reads the left seat side (thorax) airbag circuit as open. Owner complaints on a Journey and a Durango describe a loose connection under the driver seat. That side airbag may not fire, so have it checked soon and do not touch the wiring yourself.

The thorax airbag in the seat protects the chest in a side crash. The occupant restraint controller watches its firing circuit and stores B1C29 when the left seat circuit reads open.

On a 2017 Journey a mechanic read the code as a left side seat thorax squib circuit open and found a wire under the driver seat disconnected.

A 2011 Durango had the code intermittently. A seat connector repair and an ORC module replacement did not cure it, and the third dealer visit found a loose connection with high resistance at the hard-wired connector.

Pick your make

B1C29 is a manufacturer-specific code: its meaning depends on who built the car.

Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.

B1C29 on Dodge

Most likely causes

Cause 1: Loose or disconnected wire or connector under the driver seat
Supported by vehicle data
Why it ranks here
Both complaints trace the code to a connection under the driver seat.
What would change this
Rises if the lamp is intermittent or changes with seat movement.
Cause 2: Occupant restraint controller
Possible — needs testing
Why it ranks here
A dealer first called the Durango code an ORC internal failure, but replacing the module did not fix it.
What would change this
Falls after the seat connections are repaired.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

Step 1: Have the airbag or body codes read with a scan tool and note the exact code and any others.
Low riskTool: scan tool with module access
- IfB1C29 on a Journey or Durango
  It meansThe seat connection under the driver seat is the first place to check.
  Points to: Loose or disconnected wire or connector under the driver seat
- IfSeat wiring tests good
  It meansThe controller needs testing.
  Points to: Occupant restraint controller
- IfAny other combination
  It meansCheck bulletins next.
  Go to step 2
Step 2: Give your VIN to a dealer and ask for any bulletin or recall on the system.
Low risk
- IfA bulletin applies
  It meansThe dealer follows it.
  Go to step 3
- IfNothing applies
  It meansThe service manual diagnosis is next.
  Go to step 3
Step 3: Have a trained technician check the seat connector and squib circuit resistance with the maker procedure.
Best left to a shopTool: maker's diagnostic tool and service information
Warning:Never probe airbag connectors or wiring with a test light or meter, and never unplug them yourself. Airbags and pretensioners can still fire with the ignition off. Leave this to a dealer or trained technician.
- IfHigh resistance or loose connection
  It meansRepair the connection.
  Points to: Loose or disconnected wire or connector under the driver seat
- IfNo wiring fault
  It meansTest the ORC.
  Points to: Occupant restraint controller

Symptoms

Airbag light on at start-up
Airbag light comes and goes

How to fix

This is a safety-critical system, so we explain the code but don't give repair steps. Have it inspected by a qualified technician.

Parts and cost context

Seat connector and side airbag wiring:Complaints describe a connection repair, not a part. Airbag parts must be handled by a trained technician. Labour varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Dodge

2017 · Journey
Supported by vehicle data
An owner complaint reads B1C29 as a left side seat thorax squib circuit open, with a wire under the driver seat disconnected.
2011 · Durango
Supported by vehicle data
An owner complaint quotes a dealer tracing B1C29 to high resistance at a hard-wired seat connector.

No curated relationships for B1C29 yet.

All Airbags and seat-belt restraints (SRS) codes

Sources and review

NHTSA complaint ODI 11320146: Dodge Journey 2017 — NHTSA (owner complaint)
NHTSA complaint ODI 10481361: Dodge Durango 2011 — NHTSA (owner complaint)

Last reviewed: October 16, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

Severity: Inspect soon

Pick your make

Most likely causes

Cause 1: Loose or disconnected wire or connector under the driver seat

Cause 2: Occupant restraint controller

What to test first

Step 1: Have the airbag or body codes read with a scan tool and note the exact code and any others.

Step 2: Give your VIN to a dealer and ask for any bulletin or recall on the system.

Step 3: Have a trained technician check the seat connector and squib circuit resistance with the maker procedure.