If the BRAKE and ABS warning lights comeon at the same time, this could indicate afault in the brake system.

If the BRAKE and ABS warning lights comeon at the same time, this could indicate afault in the brake system.  - Instrument panel - Instruments and controls - Volvo XC90 Owners Manual - Volvo XC90

• Stop the vehicle in a suitable place and switch off the engine.
• Restart the engine.
• If both warning lights go off, no further action is required.
• If both lights are still on after the engine has been restarted, switch off the engine again and check the brake fluid level (see page 218 for the location of the brake fluid reservoir).

If the brake fluid level is above the MIN mark, drive carefully to a trained and qualified Volvo service technician and have the brake system inspected.

WARNING
If the fluid level is below the MIN mark in the reservoir or if a Brake failure – Service urgent message is displayed in the text window: DO NOT DRIVE. Have the vehicle towed to a trained and qualified Volvo service technician and have the brake system inspected.

    See also:

    Brake Support
    If the risk of collision continues to increase after the collision warning has been given, Brake Support is activated. Brake Support prepares the brake system to react quickly, and the brakes are ...

    Using the information button
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    Interior
    Volvo's largest sedan is categorized as a midsize passenger car, but its spacious interior makes some other luxury sedans look small by comparison. Even with a sunroof, headroom is ample for tall ...