Power Steering Warning Light

On electric power steering, it often follows low voltage, a sensor fault or overheating of the motor. On hydraulic systems, it can point to low fluid or a pump problem. A red light is more serious than an amber one. A weak battery can cause temporary power steering warnings on cars with electric steering.

The steering control unit monitors torque, angle and motor signals and switches off assistance if it detects a fault.

The car can still be steered, but it needs much more effort; drive carefully to a workshop. Restarting may clear a temporary fault, but a recurring light needs diagnosis.