B1764 BodySense passenger occupant mat defect (Kia)

Passenger seat occupant (OCS/BodySense) mat defect

B1764 in short

On Kia, B1764 means the BodySense occupant sensor in the front passenger seat is reporting a mat defect. The airbag light comes on and the passenger airbag may not be managed correctly. Kia says liquid on the seat or electronic devices on it can set the code. Dry the seat; if it returns, have a dealer diagnose it.

Kia's BodySense system uses an electric-field sensor in the front passenger seat to classify who is sitting there, so the airbag computer knows whether the passenger airbag may deploy. B1764 means the sensor mat is reporting a defect; B1767 is a related BodySense algorithm code.

A Kia bulletin reprinted by Vehicle Service Pros covers B1764 on the 2011-on Sorento, 2009–2010 Optima and 2010-on Rio. Because the sensor works with an electric field, Kia says liquid on the seat or electronic devices on it can set the code; it says to dry the seat, turn devices off, clear the codes, and diagnose further if the code comes back.

Sorento owners report dealers reading B1764 as a passenger OCS mat defect. Hyundai uses B1764 too, but we found only one Hyundai source, so this page speaks only for Kia.

Pick your make

B1764 is a manufacturer-specific code: its meaning depends on who built the car.

Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.

Most likely causes

  1. Liquid on the seat or electronic devices on it disturbing the sensor

    Supported by vehicle data
    Why it ranks here
    Kia's bulletin says liquid or electronic devices on the passenger seat can set B1764 because the sensor uses an electric field.
    What would change this
    Rises if something was spilled or a phone or laptop was on the seat when the light came on. Falls if the code returns with the seat dry and empty.

  2. Passenger seat OCS/BodySense mat faulty

    Supported by vehicle data
    Why it ranks here
    Sorento owners quote dealers reading B1764 as a defective passenger OCS mat; Kia's bulletin sends the car to diagnosis if the code returns.
    What would change this
    Rises if the code returns after the seat is dried and cleared. Falls if it stays away.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Have the airbag codes read with a scan tool that can talk to the airbag module, and note every code stored.

    Low riskTool: scan tool with airbag (SRS) access

    • IfB1764 is stored

      It meansKia links it to the BodySense passenger seat sensor.

      Go to step 2

    • IfOther airbag codes are stored as well

      It meansA technician should work through them in the order the service manual gives.

      Go to step 3

  2. Dry any liquid on the passenger seat and remove or switch off electronic devices on it, then have the codes cleared and see whether the light returns.

    Low risk

  3. Have a dealer or trained technician run the airbag system diagnosis from the service manual.

    Best left to a shopTool: maker's diagnostic tool

    Warning:Never probe airbag connectors or wiring with a test light or meter, and never unplug them yourself. Nissan warns that airbags and pretensioners can still deploy after the ignition is off, and that test equipment must not be used on airbag circuits unless the service manual calls for it. Leave this to a dealer or trained technician.

Symptoms

  • Airbag warning light stays on after the engine starts
  • Passenger airbag status light shows the airbag off with an adult in the seat

How to fix

This is a safety-critical system, so we explain the code but don't give repair steps. Have it inspected by a qualified technician.

Parts and cost context

  • Front passenger OCS/BodySense mat:Dealer work, as it is part of the airbag system. Labour varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Kia

  • 2011–2013 · Sorento

    Supported by vehicle data

    Kia's bulletin covers B1764 on the 2011-on Sorento, and owners report dealers reading it as a passenger OCS mat defect.

  • B1448Front passenger seat occupant sensor mat fault (Kia)

    Same system Possible — needs testing

    B1448 is another Kia code for a faulty front passenger OCS sensor mat, used on other Kia models.

All Airbags and seat-belt restraints (SRS) codes

B1764 questions

Can a phone on the passenger seat cause B1764?

Yes, according to Kia. The BodySense sensor uses an electric field, so electronic devices or liquid on the seat can set B1764. If the code returns once the seat is clear and dry, have it diagnosed.

Sources and review

  1. 2023 Accord Owner's Manual: Airbag System Indicators — American Honda Motor Co.
  2. Camry Owner's Manual (OM06291U) — Toyota
  3. Temporary airbag warning on Kia models (Kia TSB reprint) — Vehicle Service Pros ,
  4. NHTSA complaint ODI 11265979 (2013 Kia Sorento) — NHTSA Office of Defects Investigation
  5. NHTSA complaint ODI 10892256 (2013 Kia Sorento) — NHTSA Office of Defects Investigation
  6. NHTSA complaint ODI 11084197 (2011 Kia Sorento) — NHTSA Office of Defects Investigation
  7. Nissan Supplemental Restraint Systems: damage analysis and repair using Diagnostic Trouble Codes (TechNews, Summer 2016) — Nissan North America ,
  8. TSB-BOD-130: Front passenger OCS sensor mat diagnosis and replacement (2007–2009 Spectra) — Kia America / NHTSA ,
Last reviewed
Written by
Saurabh K.
Editorial review
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Technician review
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