B0083 on Cadillac: How to Diagnose & Fix
Left Front Impact Sensor Circuit
1 Cadillac model · 1 documented issue · 1 critical · $300-$1,500 repair
B0083 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)
B0083 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 B0083 mean on a Cadillac?
B0083 stands for "Left Front Impact Sensor Circuit." Manufacturer-specific airbag/restraint code, most commonly seen on GM vehicles (Chevrolet, GMC, Buick, Cadillac, and Opel/Vauxhall), where the Sensing and Diagnostic Module (SDM) reports a fault in the left front impact sensor circuit. Note that the broader SAE/ISO listing also assigns B0083 to a second-row seat belt load limiter deployment control circuit on some applications, so confirm against your vehicle's service information. When this code sets, the airbag warning light comes on and the restraint system may disable itself, meaning airbags and pretensioners may not deploy in a crash. The sub-code (symptom byte, for example B0083-39 internal failure or -05 open circuit) matters here and should be read before replacing anything. On Cadillac it is documented across 1 model: XTS.
What are the most common causes of B0083?
The most common causes of B0083 are: Failed left front impact sensor, or a sensor of the wrong part number for the vehicle's build, Damaged wiring or connector at the impact sensor, often from front-end collision damage or corrosion, Loose sensor mounting bolt or poor ground at the sensor mount, Water intrusion into the sensor connector, SDM (airbag control module) internal fault. The specific cause varies by vehicle.
How much does it cost to fix B0083 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 B0083 on a different make?
View B0083 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.