If the power steering warning light comes on, it usually means there is a fault affecting the steering assistance system. The car may still steer, but the wheel can become much heavier and the problem should not be ignored.
The warning light usually means the system that provides steering assistance has detected a fault. Depending on the vehicle, this may involve an electric power steering system, low system voltage, a steering angle issue or, on some older cars, a hydraulic steering problem.
If steering suddenly feels heavy, the warning should be treated seriously and the car should be checked as soon as possible.
Sometimes you may be able to drive a short distance carefully, but only if the steering still feels controllable. If the steering becomes very heavy, unpredictable or difficult to turn, it is safer not to continue driving until the cause is checked.
Heavy steering can make low-speed manoeuvres and emergency control much harder.
The exact cause depends on the type of steering system the vehicle uses, but several faults appear more often than others.
Electric steering systems can trigger warning lights if battery voltage is weak or unstable.
Modern vehicles often use EPS systems, and internal faults may reduce or remove steering assistance.
Faulty sensor readings can trigger the warning and affect system calibration.
Charging faults can affect voltage-sensitive systems, including electric steering assistance.
On some older cars, low power steering fluid or a leak may cause steering problems and warnings.
Electrical connectors, modules or wiring issues can also trigger the warning light.
The cost varies widely depending on whether the problem is simple electrical diagnosis or a more expensive steering component fault.
Can be relatively moderate if the problem is low voltage rather than the steering unit itself.
Often lower cost than replacing major steering components.
Can become expensive, especially on newer or premium vehicles.
Yes. Many electric steering systems are sensitive to low voltage and charging issues.
Usually yes, but without normal assistance the wheel may feel much heavier.
Sometimes, but recurring warnings should still be investigated properly.
A steering-related warning and any underlying steering defect can affect roadworthiness and MOT outcome depending on the exact fault.
