Why is the ABS TC and downhill light warnings on in a 2001 land rover discovery series II?

The ABS, traction control (TC), and downhill light warnings on a 2001 Land Rover Discovery Series II typically indicate a malfunction in the vehicle's anti-lock braking system or traction control system. This could be due to issues such as a faulty wheel speed sensor, low brake fluid, or an electrical problem. It's important to diagnose the specific cause using an OBD-II scanner or by consulting a professional mechanic, as driving with these warning lights can affect vehicle safety and performance.