B0081: How to Diagnose & Fix — First Row Center Seatbelt Load Limiter Deployment Control (Subfault)
3 vehicles · 3 makes · $150-$1,800 repair
How to diagnose and fix B0081: 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.
Cadillac XTS · 2013–2019
The front passenger seat contains a Passenger Presence System (occupant-classification sensor/module and wiring harness) that tells the airbag controller whether to enable the passenger airbag. On the XTS the sensor mat, the under-seat connector, and the wiring harness are prone to faults, illuminating the SRS/'Service Air Bag' warning and often leaving the PASSENGER AIRBAG OFF indicator stuck on (or incorrectly on with an adult seated). Because a fault can disable passenger airbag deployment, this is a genuine safety concern.
Common Symptoms
- Service Air Bag / SRS warning light
- Passenger airbag indicator stuck OFF with adult seated
- Passenger airbag status flickers
- Airbag light on after seat work
How to Fix
Diagnose with a scan tool for airbag/occupant-classification codes. First inspect, reseat, and clean the under-seat connector and wiring harness (corroded/loose pins are the most common cause). If the sensor/pressure-mat or Passenger Presence Module itself has failed, replace it; in some cases the sensor is integrated into the seat cushion, raising cost. A post-repair occupant-classification recalibration may be required.
What you need to diagnose it
The repair instructions explicitly call for reading stored codes. Use a scanner that can read the named code families before choosing a repair.This issue involves B codes, which a basic engine-code reader cannot see.The recommended scanner supports these code families; confirm your exact year, model and module coverage before buying.
Autel MaxiCOM MK808S Diagnostic Tool
All-system diagnostics (25+ modules)
$350–$450View
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Reading and clearing the code is DIY work. Module replacement or reprogramming is not — most modules are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Front Passenger Presence Module Kit with Sensor (2018-2019 Platinum/Premium)OEM84372812Cross-refGM 84451470 (current superseding PN)$456–$683
2018-2019 facelift XTS uses different PPS part numbers than 2013-2017 — do not order the earlier kits for these years.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (1)
Honda Civic · 2016–2019
Owners of 10th-gen Civics, especially 2017s, report the Body Control Module (BCM) failing to fully power down after the car is shut off, leaving a parasitic current draw that flattens the 12V battery overnight or over a few days. Because the BCM stays partially awake, the drain continues until the battery is depleted, leading to repeated no-starts and premature battery replacements that don't fix the underlying issue.
Common Symptoms
- Battery dead after the car sits overnight or a few days
- Repeated jump-starts and short battery life despite a new battery
- Measurable parasitic current draw that doesn't drop after the car 'sleeps'
- Intermittent electrical glitches or modules staying awake
How to Fix
Diagnose with a parasitic-draw test (clamp ammeter on the battery negative), pulling fuses to isolate the BCM circuit; a healthy car should settle to well under ~50 mA after sleep. The fix is typically BCM replacement and reprogramming, roughly $400-$900 depending on labor and coding; some cases are resolved by a software update or correcting an aftermarket accessory wired to a constant-hot circuit. Rule out common drains (interior/trunk/glovebox lights, dash cam hardwire, aftermarket alarm) first.
Sources for this issue (2)
Chevrolet Equinox · 2005–2009
A recurring safety complaint on this generation is failure of the passenger presence/occupant classification system in the front passenger seat. Owners report the air bag warning lamp, 'Passenger Air Bag Off' message when an adult is seated, or intermittent operation depending on seat position. The issue is tied to the seat sensor mat/module and related wiring/connectors, and it can disable proper passenger airbag deployment logic.
Common Symptoms
- air bag warning light illuminated
- Passenger Air Bag Off with adult in seat
- intermittent passenger airbag status
- warning changes when seat is moved
- service air bag message
How to Fix
Scan the SIR module for occupant classification and seat sensor faults, inspect under-seat connectors for tension or corrosion, and verify the system with a capable scan tool after repairs. Depending on the fault, repair may involve connector service, harness repair, or replacement/calibration of the passenger presence sensor assembly. Because this affects airbag operation, proper post-repair verification is essential.
Sources for this issue (1)
Find B0081 by make
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B0081 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 B0081 mean?
B0081 stands for "First Row Center Seatbelt Load Limiter Deployment Control (Subfault)." This is a supplemental restraint (SRS) code relating to the deployment control circuit for the first-row center seatbelt load limiter / pretensioner. The airbag control module monitors this restraint circuit and sets the code when it detects an electrical fault such as an open, short, or out-of-range resistance. Because it involves a crash-protection device, the airbag/SRS warning light typically illuminates and the related restraint may not deploy correctly in a collision.
What are the most common causes of B0081?
The most common causes of B0081 are: Open or shorted wiring in the load limiter / pretensioner circuit, Faulty or already-deployed restraint pretensioner, Corroded or loose connector at the seatbelt/restraint device, Damaged connector under the seat or in the floor harness, Faulty airbag (SRS/SDM) control module, Poor ground to the restraint system, Wiring damage from seat movement or moisture. The specific cause varies by vehicle.
How much does it cost to fix B0081?
Repair costs for B0081 range from $150 to $1,800, depending on the vehicle and root cause.
Which vehicles are affected by B0081?
Au7o has documented B0081 across 3 vehicle models from 3 manufacturers: Cadillac, Chevrolet, Honda.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.