By iCarsoft Official Store Technical Team, Automotive Diagnostics Editors · Updated October 17, 2026 · Technical sources checked
Quick Answer
In the older GM-style table, B0029 describes an open passenger side deployment loop. It does not prove that the passenger side-airbag inflator is defective or every B0029 uses a seat-to-body connector. Save the full OEM record for qualified, VIN-specific SRS diagnosis.
What Does the B0029 Code Mean?
The historical GM-style Gunson table describes B0029 as an open right-front/passenger side deployment loop. GM special coverage 15643A includes B0029 in a specific power-seat connector condition. The older table cannot establish every OEM's current component mapping, so identify the full code and actual VIN architecture first. The full fault record determines the test branch.
In the verified older side-loop context, the restraint controller supervises the named side-airbag path through its wiring and connections. A seat-to-body connector may be part of that path on the GM applications described by 15643A. The exact restraint and route must still come from the vehicle's own diagram.
An open classification describes the combined path rather than isolating the inflator. A base-code lookup is also insufficient to assign seat position, restraint type or connector location across OEMs. Do not begin seat or pillar disassembly merely because the old description contains 'passenger side'.
The old open-loop description is an implementation reference, not a universal OEM map. The full controller text must identify the actual restraint before any physical access.
GM 15643A, February 2017, concerns defined 2004–2009 Cadillac XLR and 2005–2013 Corvette power-seat applications. It describes interference that can drag a seat/body connector along carpet during adjustment, loosen terminals or separate the connection. B0029 is listed among its diagnostic codes. It is historical special coverage, not a current free-repair promise or universal connector instruction.
GM's documented condition links seat movement with connector interference and loosening. That makes routing and connection assessment relevant before condemning a side-airbag inflator. It does not establish every B0029 cause: confirm the actual VIN, channel and observed defect, then use the current approved professional repair.
Save the full module wording and suffix before clearing; they can change the test path.
Separate B0029 from adjacent fault families
| Code | General description | Key distinction |
|---|---|---|
| B0029, legacy | Passenger-side deployment loop open | Confirm the actual OEM component and complete subtype. |
| B0028, legacy | Passenger-side deployment loop resistance low | Different older electrical classification. |
| B0030, legacy | Passenger-side deployment-loop voltage/short fault | Do not apply the open branch to a voltage subtype. |
| B0041, legacy | Driver-side deployment loop open | Different side in the older table; current VIN map governs. |
Record the complete B0029 description. The suffix, reporting module and companion faults can change the diagnostic path. Use the manufacturer's full wording and test procedure for the exact vehicle.
B0029 Symptoms and Likely Causes
Record B0029 symptoms and fault status; symptoms alone cannot identify a failed part.
Check whether companion faults share a proven cause.
Save its exact wording, timing and controller status. It does not identify an internally open inflator.
On the actual GM application, note when the warning appeared relative to adjustment. Do not reproduce it by handling SRS connections.
Preserve the service history and components disturbed. Recent work is useful context but not proof of the cause.
A working power seat does not verify the separate side-restraint electrical path or remaining crash protection.
Practical cause-checking order
- Actual OEM mapping: A historical base-code description can be mistaken for a current universal location. Resolve the full controller record and VIN diagram before deciding which restraint needs service.
- Seat/body connector context: GM15643A identifies a particular seat/body connector condition. Apply it only when the model, equipment, full fault record and observed condition fit the source.
- Routing and retention: Harness routing and connector retention can be affected by movement or earlier service in the documented path. Actual evidence is required; seat adjustment alone does not diagnose a fault.
- Open-path isolation: An open-path classification cannot separate wiring, terminal connection and firing device without the approved professional branch. A generic continuity check is not an authorized inflator test.
- Component and setup evidence: A restraint or controller decision follows confirmed external-path and setup checks. Replacing an assembly or clearing a warning cannot independently prove the original defect has been removed.
Did B0029 appear after recent power-seat, upholstery, interior-trim, restraint or collision work? Recheck the documented connections, parts and setup steps affected by that work. Record battery and software history; a post-repair code does not prove the new part is defective.
How Serious Is B0029, and Can You Drive?
Arrange qualified SRS diagnosis promptly and follow the owner's manual and any VIN-specific do-not-drive recall. Normal operation does not certify crash protection. The code cannot establish restraint availability or a safe driving distance. Stop safely for immediate hazards or abnormal vehicle control.
Record warning messages, operating conditions and service history. Do not induce wheel slip, emergency braking or a handling event on public roads. A red stop warning or abnormal control overrides any verification plan.
Stop and arrange a tow if there is smoke, heat, damaged restraint wiring, an abnormal vehicle-control condition, a deployed restraint after a crash or an owner-manual stop warning.
Do not probe deployment-circuit connectors with a multimeter or test light, install bypass resistors, bridge wires, apply voltage, command deployment or remove an airbag using generic instructions. Do not erase crash data or promise a reset restores protection. Battery isolation, discharge time, handling and reconnection are manufacturer-specific professional procedures.
How to Diagnose B0029 in the Right Order
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Save B0029 and the seat-service history
Save the complete SRS report, B0029 suffix, status, controller and warning timing before clearing. Record actual seat, upholstery, trim or collision work and already observed seat-position context. Do not reproduce the concern through connector handling or invent a movement-related cause.
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Identify the actual restraint and route
Retrieve the current VIN-specific component description and diagram. Establish restraint type, side, channel and actual connector route. Gunson's older passenger-side open label cannot provide that map for every OEM. Do not name a curtain, seat-side inflator or particular connector from the base number alone, and do not start disassembly as a way to discover the system.
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Check the bounded GM connector case
On the defined power-seat XLR/Corvette application, compare the full code and actual equipment with 15643A and current service information. Its interference condition supplies a diagnostic lead, not present coverage eligibility, another vehicle's circuit map or owner-level permission to copy physical repair steps.
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Require safe routing and connection assessment
Qualified SRS personnel inspect the specified routing, retention and terminal condition under the exact OEM isolation and handling procedure. The owner should not manipulate a live connector, use a probe, fit a resistor or bridge the circuit. Repeatedly adjusting a seat while touching wiring is not an acceptable substitute for the approved professional diagnostic method.
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Tie the repair to the open-path evidence
Require the shop to identify the actual failed open-path branch and the supporting permitted test result. Wiring, connection and restraint outcomes must be distinguished before approving parts. If a connector defect is confirmed, its routing or interference cause must also be addressed. A temporarily clear lamp cannot certify that the same problem will not recur.
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Verify the original movement context professionally
After the proven repair, complete required setup and non-deployment SRS prove-out. Reread full-code statuses and compare the original warning and seat-position context using the OEM-approved method. Do not use a road drive as an airbag function test. Retain any unresolved intermittent limitation and distinguish a cleared record from documented repair verification.
Specifications are vehicle-specific. Use the exact VIN specifications, approved test points and required operating state. No generic value or drive cycle can replace the applicable procedure. Manufacturer examples here do not establish specifications for other applications.
B0029 Repairs and Cost Planning
A B0029 repair must address the demonstrated failure. Do not replace an assembly from the code alone.
Recheck installation and required setup after repair. A movement-related connector case does not authorize an owner wiggle test or live disconnection. Current OEM precautions govern qualified inspection and verification.
Ask the shop to name the failed branch and the measurement supporting each proposed repair.
Authorize diagnosis before parts while the cause remains uncertain.
| Possible path | Quote basis |
|---|---|
| Qualified full-code identification of the actual side-restraint path | VIN-specific quote |
| Proven OEM-permitted terminal or seat/body connection repair | VIN-specific quote |
| Correction of confirmed harness routing, retention or restraint defect | VIN-specific quote |
| Required setup and non-deployment final SRS verification | VIN-specific quote |
These are alternative repair paths, not prices to add together. Request a VIN-specific quote separating diagnosis, parts, labor, fluids, taxes, required setup and verification. Ask which failed test supports the proposed repair and whether warranty coverage applies.
Using iCarsoft CR Eagle P for B0029
On a supported vehicle, iCarsoft CR Eagle P can save accessible faults, available freeze frame, live data and diagnostic reports. Preserve the B0029 evidence before clearing.
Compare the saved and final module records. Scan data supports diagnosis but does not replace the OEM reference, physical measurement or safety-system functional check.
Preserve the OEM-identified B0029 side-restraint path evidence
iCarsoft CR Eagle P
Review supported codes and relevant live data together. Confirm the exact VIN, controller access, PIDs with iCarsoft before purchase; generic product capabilities do not guarantee a B0029-specific function.
Check current CR Eagle P price and availabilityCheck CR Eagle P compatibility by VINThe official product page describes supported full-system diagnostics, available live data, freeze frame and diagnostic reports; exact ECU access and non-deployment functions depend on the VIN and software. Confirm the requested function by VIN before purchase. Follow OEM prerequisites and stop for abnormal operation.
Know the measurement boundary. Scan data describes ECU-provided information; it does not directly prove the physical condition of the OEM-identified B0029 side-restraint path. Where required, use qualified SRS service equipment and the current OEM non-deployment procedure and compare reported values with the relevant measured evidence.
Verify the B0029 Repair
After repair, verify installation, clearance and required setup. Save the final findings and clear only erasable records as instructed. Battery disconnection is not a repair.
Use the manufacturer's non-deployment post-service restraint checks in a qualified workshop. Compare the original operating state with current data for the OEM-identified B0029 side-restraint path, and check current and pending faults in related modules. A clean start or idle period does not prove the repair; use the OEM functional check for the affected system.
Compare the original and final fault status. Record the functional-check result and whether the original event returned.
If B0029 returns, compare its suffix, status, failure order and operating conditions with the saved baseline before replacing another part. Revisit the failed branch and inspect anything disturbed. Confirm the prescribed affected-system functional verification separately from code clearing.
Verification follows the system involved. After saving the original evidence, use the OEM procedure to clear erasable records, complete any required calibration or functional check, and compare the final module status with the original warning and fault conditions.
Related OEM-Identified B0029 Side-Restraint Path Code Guides
Compare the related monitor families below. Shared symptoms or components do not make their repair procedures interchangeable.
B0029 Frequently Asked Questions
Does B0029 always mean the passenger seat airbag is defective?
No. Its older open-loop label does not isolate the inflator or establish every OEM's restraint location. GM15643A describes a specific seat/body connection cause on listed power-seat vehicles. Identify the actual VIN path and professional failed-test evidence before selecting a part.
What should I check first for B0029?
Save every module's codes and freeze frame before clearing. Confirm the full definition, suffix and VIN architecture. Then inspect recent power-seat, upholstery, interior-trim, restraint or collision work, connectors and shared supplies. Those facts determine whether the next test needs qualified SRS service equipment and the current OEM non-deployment procedure or a qualified non-deployment restraint procedure.
Can I drive with the B0029 code?
Arrange qualified SRS diagnosis promptly and follow the owner's manual and any VIN-specific do-not-drive recall. Normal operation does not certify crash protection. The code cannot establish restraint availability or a safe driving distance. Stop safely for immediate hazards or abnormal vehicle control.
Why did B0029 return after a part was replaced?
If the warning returns after seat or airbag replacement, compare the original full code and actual routing. A connector or retention defect may remain, while a different suffix or another channel requires a separate diagnosis.
What should a B0029 repair estimate include?
Ask for the failed-test evidence and a VIN-specific breakdown of diagnosis, parts, labor, taxes, required setup and verification. A code alone cannot establish the repair price.
Can CR Eagle P diagnose and clear B0029?
On a supported vehicle, CR Eagle P can organize available faults, freeze frame, live data and reports, and can clear erasable records after repair. Confirm exact ECU coverage. It must not be used to deploy, bypass or erase crash data and cannot replace the qualified OEM procedure for the OEM-identified B0029 side-restraint path.
The iCarsoft Official Store Technical Team maintains the store's fault-code library. This guide organizes published technical references and verified product information; it does not document a hands-on test of a particular vehicle or claim an individual engineer's review.
Technical and cost references
- Gunson Instruction 77031 — EOBDII Fault Code Reader, Standard B-code table. Undated legacy B0029 passenger-side deployment-loop open wording; not current universal SAE authority.
- GM 15643A — Special Coverage Adjustment – Airbag Light On. February 2017; defined power-seat XLR/Corvette connector-interference example with B0029 listed. Historical coverage only.
- GM PIP5094 — Prior To Any Circuit Testing. February 2013; general OEM terminal-fit context before component replacement. Keyword listing does not define B0029.
Product information: Official iCarsoft CR Eagle P page.
Editorial note: General diagnostic education, not a substitute for the owner's manual, current VIN-specific service information or professional inspection. Test limits, procedures, coverage and costs vary. Related articles provide context; apply only the specifications and repair procedures that match the vehicle. No universal failure rate, repair price or outcome is implied.
