Kia Code B1322: Passenger Occupant Classification (Weight) Sensor Defect

If your Kia has stored trouble code B1322, it points to a fault in the passenger occupant classification system — the seat sensor that tells your airbags whether the front passenger seat is occupied and by how much weight. It’s a safety-system (SRS) code, and it usually turns on the airbag warning light and may disable the passenger airbag. Here’s what it means and how it’s handled.

What Does Code B1322 Mean?

On Kia (and Hyundai) vehicles, B1322 is defined as a “Passenger Occupant Classification / Weight Classification System (WCS) Sensor Circuit” fault. The Occupant Classification System uses a weight sensor in the passenger seat to decide whether — and how forcefully — the passenger airbag should deploy in a crash (for example, suppressing it for a small child or empty seat). When the module detects a fault in that sensor or its circuit, it sets B1322 and flags the SRS system.

Common Symptoms of B1322

The clearest signs are the airbag/SRS warning light staying on and the passenger airbag status light behaving incorrectly. The passenger airbag may be disabled while the fault is present — meaning it might not deploy (or might deploy incorrectly) in a collision. On a scan, the SRS/occupant module reports the stored code.

Common Causes

Typical causes include a failed occupant weight sensor or seat mat, damaged or disconnected wiring and connectors under the passenger seat, a fault in the occupant classification control module, or a seat that was removed, replaced, or re-covered without the sensor being handled correctly. On salvage and rebuilt Kias, disturbed under-seat connectors are a very common trigger.

Is It Safe to Drive With Code B1322?

The car drives normally, but treat this as a safety code. With the occupant classification system faulted, the passenger airbag may be disabled or deploy incorrectly, so the protection for a front-seat passenger may not work as intended. It’s fine to drive to get it repaired, but don’t put it off — especially if you regularly carry a front passenger.

How B1322 Is Diagnosed

Diagnosis starts with an SRS-capable scan (not just a basic reader) to confirm the code and read live occupant-system data. A technician then inspects the passenger seat weight sensor/mat and the wiring and connectors beneath the seat, and checks whether the occupant module is holding stored or hard codes that need clearing once the fault is repaired. Some systems require an occupant-classification calibration after service.

Repair Options and What to Expect

If the fault is a damaged wire, connector, or the weight sensor/seat mat, that’s repaired or replaced first. Then the SRS/occupant module often needs to be reset to clear stored codes so the airbag light goes out and the system arms correctly — a step that’s easy to miss and leaves the light on if skipped. Some vehicles also need an occupant-classification recalibration.

How LockNCal Can Help

This one is in our lane. B1322 is an airbag/SRS occupant code, and SRS module resets are exactly what we do — clearing stored crash and hard codes so your restraint system comes back online after the fault is repaired ($250 mobile on-site across Dallas–Fort Worth, or $49.99 mail-in nationwide with free two-way shipping). Once the occupant sensor or wiring behind B1322 is fixed, we can reset the SRS module so the airbag light goes out and the passenger airbag is protected again. Need ADAS calibration or key/immobilizer work too? We handle those as well.

Frequently Asked Questions

Will my passenger airbag work with a B1322 code?

Possibly not. With the occupant classification system faulted, the passenger airbag may be disabled or set to deploy incorrectly. It’s a genuine safety concern worth fixing promptly.

Do I need a new occupant module for B1322?

Not always. If the seat sensor and wiring are sound, the module often just needs to be reset (and sometimes recalibrated) to clear stored codes. A replacement is only needed if the sensor or module itself has failed.

How much does it cost to fix the airbag light after B1322?

After the occupant sensor or wiring is repaired, an SRS module reset with LockNCal is $250 mobile on-site in DFW or $49.99 mail-in nationwide with free two-way shipping. Sensor or wiring repair cost varies by cause.