B1490 on Hyundai

Hyundai occupant classification system fault

Severity: Inspect soon

The airbag light means the system found a fault, and owner's manuals say to have it checked promptly because the airbags may not work as designed; this code concerns the passenger occupant sensing system.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on Hyundai. For what B1490 means, the ranked causes and the test order, see the B1490 guide.

What's different on Hyundai

Hyundai

2013 · Tucson
Supported by vehicle data
Owner reports repeated dealer repairs and a returning airbag light with B1490 on the Hyundai tool.
2017 · Accent
Supported by vehicle data
B1490 read as an occupant classification fault.
2013 · Azera
Supported by vehicle data
B1490 with B1763 read as OCS and OCS ECU defects; ECU and seat cushion advised.

Sources and review

NHTSA complaint ODI 10574858 (2013 Hyundai Tucson) — NHTSA Office of Defects Investigation
NHTSA complaint ODI 11083863 (2017 Hyundai Accent) — NHTSA Office of Defects Investigation
NHTSA complaint ODI 11170467 (2013 Hyundai Azera) — NHTSA Office of Defects Investigation
2023 Accord Owner's Manual: Airbag System Indicators — American Honda Motor Co.
Camry Owner's Manual (OM06291U) — Toyota
Nissan Supplemental Restraint Systems: damage analysis and repair using Diagnostic Trouble Codes (TechNews, Summer 2016) — Nissan North America , September 1, 2016

Last reviewed: October 15, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

Severity: Inspect soon

What's different on Hyundai

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Sources and review

Hyundai