B1806 fault code: what it means

B1806: Open circuit in the front passenger airbag squib circuit on a Lexus. Passenger airbag will not deploy.

Body · Safety risk

Usual causes, most likely first

passenger airbag connector loose or corroded
wiring fault behind the dash

B1806 by make

Lexus

Open circuit in the front passenger airbag squib circuit on a Lexus. Passenger airbag will not deploy.

Usual causes: passenger airbag connector loose or corroded; wiring fault behind the dash

Subaru

Open in passenger airbag circuit. Airbag light on.

Usual causes: connector under the dash; harness fault; passenger airbag module

Toyota

Open circuit in the front passenger airbag squib circuit. The passenger airbag will not deploy.

Usual causes: passenger airbag connector loose or corroded; wiring fault behind the dash; airbag removed or replaced wrongly

Not sure what B1806 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.