OBD-II trouble code
B0092: Left Side Restraints Sensor 2 (Subfault)
The airbag/SRS control module detected a fault in a left-side restraint sensor circuit. Side-impact protection on that side may not deploy as designed, so this needs prompt professional attention.
Quick facts
- System
- Body
- Category
- Airbag / SRS Restraints
- Severity
- High severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $100 – $700
- DIY difficulty
- Shop recommended
What does B0092 mean?
B0092 is a body (B) code stored by the airbag control module — the SDM or Restraints Control Module. The SAE-generic definition refers to a fault with a left-side restraints sensor (sensor 2), one of the satellite impact sensors that tell the module a side collision is occurring so it can fire the side and curtain airbags and seat-belt pretensioners on that side. As with most B-codes, the exact application varies by manufacturer: on Ford vehicles B0092 typically points to the left side restraint sensor circuit, while some GM applications report it in connection with the passenger presence/occupant sensing system. Confirm the exact meaning against your make's service data.
The module sets B0092 when that sensor's circuit reads out of range — open, shorted, or with resistance outside the narrow band these safety circuits demand — or when the sensor stops reporting valid data. Because a side-impact sensor is mounted low in a door, B-pillar, rocker, or seat frame, its wiring and connector are exposed to moisture, road spray, and repeated flexing, which is why connector corrosion and harness damage are among the most common causes.
This is a supplemental restraint fault, not a driveability fault: the vehicle drives normally, but the side-impact protection on the affected side may not work as designed in a crash, and airbag circuits carry a small risk of unintended deployment when mishandled. SRS diagnosis and repair should be performed by a qualified technician who can safely disable the system, and the fault should not be left unrepaired.
Common causes
- Corroded, wet, or loose connector at the side-impact sensor
- Damaged wiring in the door, rocker, or seat harness (flex fatigue or water intrusion)
- Failed left side-impact restraint sensor
- Prior collision or door/rocker repair that disturbed the sensor or wiring
- Restraint module or sensor replaced but not correctly programmed
- Faulty airbag/SRS control module
Symptoms
- Airbag / SRS warning light on
- Stored B0092 fault in the restraints module
- No effect on engine or driving performance
- Possible additional side-restraint or occupant-sensing codes stored alongside it
Diagnostic steps
- 1.Use a scan tool that can access the airbag/SRS module and record B0092 and any companion restraint codes.
- 2.Confirm the exact definition for the specific make and model, since B0092 covers different left-side restraint sensors across manufacturers.
- 3.With the system safely disabled per service procedure, inspect the left-side sensor connector and harness for corrosion, moisture, or damage.
- 4.Check areas exposed to water and flexing — the lower door, rocker, B-pillar base, or seat frame — where side-impact sensors live.
- 5.Measure the sensor circuit's resistance against specification to separate a wiring fault from a failed sensor.
- 6.If a sensor or module was recently replaced, verify it was the correct part and was properly programmed to the vehicle.
- 7.Repair wiring/connector faults or replace the indicated sensor, then clear codes and confirm the SRS light stays off.
Repair cost
$100 – $700
A connector or wiring repair can be modest, while replacing a side-impact restraint sensor commonly runs $200-$600 including diagnosis. Costs rise if the sensor is buried in a door or seat structure, if programming is required, or if the airbag/SRS control module itself is at fault. SRS work should be done by a qualified technician, so plan for professional diagnostic time.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with airbag / srs crash sensor replacement preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
Leave this one to a qualified shop. It typically involves emissions-critical components, refrigerant handling, or other work that requires manufacturer-grade tooling, training, or certification. DIY attempts often produce a more expensive problem than the original code.