Volvo XC90 Twin Engine Warning Lights: What They Mean

Other warnings and indicators

Fault in brake system

The brake fluid level may be too low.
What to do: Contact your nearest authorized workshop to have the brake fluid level checked and adjusted. PDF page 99

Low oil pressure

Engine oil level is too low when it comes on while driving.
What to do: Stop the engine immediately, check oil and add if needed. If oil level is normal, contact a workshop. PDF page 99

Airbags

A fault has been detected in one of the vehicle's safety systems when it stays on or comes on while driving.
What to do: Read the instrument panel message. Volvo recommends contacting an authorized Volvo workshop. PDF page 99

Generator not charging

A fault has been detected in the electrical system while driving.
What to do: Contact a workshop; Volvo recommends an authorized Volvo workshop. PDF page 99

Parking brake on

Glows steadily when the parking brake is applied. Flashing indicates a fault.
What to do: If flashing, read the message in the instrument panel. PDF page 99

Seat belt reminder

Driver or front passenger has not fastened the seat belt, or someone in the rear seat has unbuckled. PDF page 99

PASSENGER AIRBAG OFF indicator lamp

Passenger's front airbag is disabled because the seat is empty or occupied by a low-weight occupant or object.
What to do: If an adult is seated, have them sit upright and centered for two minutes after restart; otherwise ride in rear seat. PDF page 60

Collision risk

City Safety warns of a risk of collision with a vehicle, pedestrian, cyclist or large animal. PDF page 99

Green: system on

BLIS indicator light

Green shows BLIS is on, gray off. It lights on the side where a vehicle is detected and brightens and flashes if a turn signal is given. PDF page 351

Summarized in our own words from the 2018 Volvo XC90 Twin Engine owner's manual (AI-assisted; every light name was matched against its cited page 2026-10-18). Your vehicle may not have every light, and other years can differ. A red warning that stays on usually means stop safely and check: your manual has the final word.