Second Row Left Seatbelt Load Limiter Deployment Control
The B0083 code means the vehicle's onboard diagnostic system has detected: Second Row Left Seatbelt Load Limiter Deployment Control. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $100 - $900 (connector or clockspring commonly; the airbag/pretensioner unit itself at the high end)
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Common Symptoms
- Airbag (SRS) warning light on
- The affected restraint is typically disabled while the fault is present
- No drivability symptom - this is purely a safety-system fault
Probable Causes (Ranked by Likelihood)
- Open, short, or high resistance in this deployment (squib) circuit - often a connector under a seat or in the steering column (clockspring) High
- Damaged clockspring or under-seat harness from steering or seat movement High
- Faulty pretensioner/airbag unit itself Moderate
- SRS control module fault Low
Common Fixes by Vehicle
What techs usually find when diagnosing B0083 on specific vehicles — tap your vehicle for the fix and the exact part:
2007-2017 Toyota Camry/Corolla moderate DIY
B0083 (driver pretensioner) on Toyotas usually points to the yellow connector at the B-pillar base. Check for a loose connector first. If the pretensioner has deployed (post-collision), the entire seat belt assembly must be replaced -- pretensioners are single-use. Toyota will not accept a used one. Always disconnect the battery and wait 90 seconds before working on the SRS.
Labor: 1-2 hours2008-2018 Toyota Highlander moderate DIY
Highlander B0083 is commonly caused by the driver-side pretensioner harness being pinched when the seat was moved for cleaning. Inspect under the seat rail -- a chafed wire there will trigger this code. Repair with solder and heat shrink, not crimp connectors -- SRS circuits need a solid low-resistance repair. Clear the code with TechStream after repair. There is no consumer-grade part or tool that safely resolves a restraint deployment-circuit fault, so we do not recommend one here - a scan tool that only clears the code would switch the warning light off while leaving the restraint disabled.
Labor: 1-2 hours2010-2019 Toyota 4Runner moderate DIY
4Runner drivers who add seat covers sometimes trigger B0083 by catching the yellow connector when installing. Remove the cover, inspect the connector at the B-pillar, and reseat. If the resistance reading on the pretensioner is out of spec (should be ~2-3 ohms), replace the seat belt assembly. Toyota does not sell the pretensioner separately from the belt.
Labor: 1-2 hoursFrequently Asked Questions
What does B0083 mean?
B0083 is a generic (ISO/SAE-standardized) restraints code: a fault in the Second Row Left Seatbelt Load Limiter Deployment Control circuit. The SRS module monitors every restraint circuit continuously and sets this when that circuit fails its checks.
Can I keep driving with B0083?
An SRS fault usually means part of the airbag or seatbelt system is DISABLED until repaired - the airbag warning light stays on and that restraint may not deploy in a crash. Never probe deployment-loop (squib) circuits with a test light or ohmmeter; accidental deployment causes serious injury. SRS diagnosis belongs at a qualified shop.
Will the airbag still work with B0083 stored?
Assume no for the affected restraint. With most SRS faults, the module disables the affected circuit (sometimes the whole system) until it is repaired and the code cleared. That is why the warning light stays on.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
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Read the code and its subfault detail with an SRS-capable scan tool - the subfault says open vs short vs resistance.
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Inspect the yellow SRS connectors on this circuit's path (under seats, in the column) for looseness or corrosion - AFTER disabling the SRS per the OEM procedure.
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Never measure a squib circuit with a standard meter or test light; use the OEM's load tool procedure only.
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Repair connectors/wiring with the OEM-specified method; many SRS harnesses must be replaced, not spliced.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- All OBD-II vehicles - generic (ISO/SAE) restraints code standardized across makes
Related Codes
See All Codes & Fixes for Your Vehicle
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