B1B02: How to Diagnose & Fix — Driver Airbag Squib 1 Circuit Open (manufacturer-specific)
2 vehicles · 1 makes · $150-$1,200 repair
How to diagnose and fix B1B02: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Jeep Wrangler · 2000–2006
A common TJ/LJ Wrangler failure is the steering column clock spring wearing out internally, which breaks electrical continuity to the driver airbag, horn, and cruise-control switches. Owners typically report an illuminated airbag light along with an inoperative horn and cruise control. This was widespread enough to generate many owner complaints and a Jeep recall campaign on certain vehicles.
Common Symptoms
- Airbag warning light illuminated
- Horn inoperative
- Cruise control stops working
- Intermittent steering wheel switch functions
- SRS fault stored
How to Fix
Diagnosis usually starts by confirming loss of horn/cruise functions and scanning the airbag module for driver squib or clock spring circuit faults. The repair is replacement of the clock spring assembly with the updated part, followed by steering wheel centering and clearing any stored airbag faults. If the steering wheel has been removed previously or the front end alignment is off-center, the new clock spring must be installed in its centered position to avoid repeat failure.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Dorman 525-118 airbag clockspring without cruise controlOEMDorman 525-118
Restore the confirmed clockspring circuit on the 2000 no-cruise branch Fitment/availability: 2000 Wrangler/TJ without cruise control; crosses 56009070/56047103 family. Confirm equipment and VIN; not the speed-control version.
- Crown 56047103AB clockspring without speed controlOEMCrown 56047103AB
Restore the confirmed clockspring circuit on the 2001-2002 no-speed-control branch Fitment/availability: 2001-2002 Wrangler TJ without cruise/speed control. Do not use on vehicles equipped with cruise or on 2003-2006.
- Dorman 525-119 airbag clockspringOEMDorman 525-119
Restore the confirmed clockspring circuit on the later TJ branch Fitment/availability: 2004-2006 Wrangler/TJ and OE cross 56047144AB-AE. The 2003 catalog uses 56047144AA and must be sourced/confirmed separately; do not silently extend th…
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Jeep Grand Cherokee · 2022–2024
Owners of WL-generation Grand Cherokee models have reported persistent airbag warning lights and restraint system messages tied to seat wiring/connectors, especially around second-row or seat-mounted side airbag circuits. FCA also issued safety actions/TSB guidance on certain restraint-related faults in this generation. The practical problem is that the SRS may be disabled or operate improperly until the connector, harness, or module issue is corrected.
Common Symptoms
- airbag warning light on
- service airbag system message
- restraint system warning chime
- intermittent warning after moving seats
- warning returns after clearing codes
How to Fix
Scan the Occupant Restraint Controller for stored codes, then inspect under-seat connectors, terminal tension, harness routing, and any signs of pin drag or intermittent contact. Repairs typically involve connector replacement, terminal repair, harness retention updates, or module/software updates depending on the exact fault. Clearing the light without fixing the root cause usually results in repeat warnings.
Owner tips & cautions
- TipOwners often suggest documenting exactly when the warning appears, especially after seat movement or folding the second row, to help isolate an intermittent connector issue.
- TipAvoid probing SRS connectors with generic test lights; use proper scan diagnostics and battery disconnect procedures before any seat harness inspection.
Sources for this issue (1)
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B1B02 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1B02 mean?
B1B02 stands for "Driver Airbag Squib 1 Circuit Open (manufacturer-specific)." B1B02 is a manufacturer-specific body (B) code used notably by Chrysler/Dodge to indicate an open circuit in the driver airbag squib (the igniter that deploys the airbag). The restraints control module continuously monitors this circuit, and an open means the driver airbag may not fire in a crash. The airbag warning light is typically on. This is safety-critical and is usually caused by a wiring, clockspring, or connector fault. Confirm against the specific vehicle's service data, as B-code meanings vary by maker.
What are the most common causes of B1B02?
The most common causes of B1B02 are: Faulty clockspring (steering column connection), Open or damaged wiring in the driver airbag circuit, Poor or corroded connector at the airbag, Faulty driver airbag module, Faulty restraints/occupant control module, Disturbed connector after steering or airbag service. The specific cause varies by vehicle.
How much does it cost to fix B1B02?
Repair costs for B1B02 range from $150 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by B1B02?
Au7o has documented B1B02 across 2 vehicle models from 1 manufacturers: Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.