The warning’s meaning depends on the vehicle, but a light that stays on should not be ignored. If the steering becomes heavy or behaves unusually, stop safely and seek assistance.
The power-steering warning usually shows a steering wheel with an exclamation mark. Its colour and exact meaning vary by model. A light that appears briefly when the vehicle starts and then goes out may be part of the initial system check. If it stays on or appears while driving, it needs attention.
Power steering reduces the effort needed to turn the wheel. The system may be electric or hydraulic, and possible causes differ: an electric system may have a problem with its motor, sensors, connections, electronics, battery or charging system; a hydraulic system may have low fluid, a leak or a pump fault. The owner’s manual can explain the warning for a particular vehicle.
If electric power steering fails, steering assistance may stop and the wheel may become harder to turn. Mazda, Ford and Kia manuals advise stopping safely and having the system checked; the precise procedure depends on the make and model.
If the steering becomes heavier, especially when parking or manoeuvring slowly, reduce speed and stop where it is safe. If the steering still feels normal and only the warning remains on, drive cautiously to a repair shop for diagnosis. If the wheel suddenly becomes stiff or the vehicle behaves unusually, do not continue the journey; call roadside assistance or a tow truck.
Even if the warning disappears after a restart, do not simply erase it and forget about it. The cause should be identified because a steering fault can affect safety.