B0081 on Cadillac: How to Diagnose & Fix
First Row Center Seatbelt Load Limiter Deployment Control (Subfault)
1 Cadillac model · 1 documented issue · 1 critical · $300-$1,500 repair
B0081 on Cadillac by model: symptoms, diagnosis and fix
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)
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 on a Cadillac?
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. On Cadillac it is documented across 1 model: XTS.
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 on a Cadillac?
Published repair estimates on Cadillac range from $300 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for B0081 on a different make?
View B0081 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.