B1409Side impact sensor (driver side): communication fault

• Hyundai/Kia code · Airbag (SRS)
• Lights a warning lamp

How the car detects it

The side crash sensor on the driver side doesn't communicate correctly with the airbag unit. While an airbag fault is stored, the affected airbag or pretensioner may not deploy in a crash. Have it repaired before relying on it. Never probe airbag connectors with a meter: that can fire the airbag.

What you may notice

• Airbag warning light

Likely causes

• PossibleSensor
• PossibleWiring or connector in the door pillar

Sources

• static.nhtsa.gov › INRD-EA19001-76579.pdf · official document
• youcanic.com › hyundai-fault-code-dtc

Backed by an official manufacturer document.

From Obdaryn's Hyundai/Kia pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.