What causes the abs and traction control light to come on?

The ABS (Anti-lock Braking System) and traction control lights may illuminate due to a variety of issues, including a malfunctioning ABS sensor, low brake fluid levels, or a faulty wheel speed sensor. Additionally, problems with the brake system, such as worn brake pads or issues with the ABS module, can trigger these warning lights. It's important to diagnose the specific cause using an OBD-II scanner, as continued driving with these lights on can affect vehicle safety and performance.