With the power steering light on, steering assistance is reduced or missing: the wheel remains drivable but gets heavy, especially at low speed. On electric systems the cause is often low supply voltage or a sensor.
How it shows up
- Power steering warning light (steering wheel with exclamation mark), yellow or red
- Heavy steering, especially when manoeuvring
- Assistance that comes and goes
- "Check steering" message on the display
Most frequent causes
| Cause | Typical symptom | What to do |
|---|---|---|
| Weak battery or alternator (low voltage) | Light appears after starting or with many loads | Check battery and alternator |
| Torque or steering angle sensor | Irregular assistance, steady light | Read in diagnosis and replace or calibrate |
| Column electric motor (EPS) | Steady heavy steering | Replace the column or module |
| Wiring or connectors | Intermittent light | Check and repair |
| Fluid level or pump (hydraulic steering) | Noise, heavy steering when cold | Top up, repair leaks or replace the pump |
Can you drive?
Yes, with care: steering works mechanically but needs more effort, and low-speed manoeuvres are demanding. It is not a fault to postpone: in an emergency the response may be compromised.
What to do, in order
- Switch off and restart: sometimes it is a momentary error.
- Check the battery and terminals.
- Have the errors read in diagnosis.
- After the repair, calibrate the steering angle sensor if required.
How much does it cost to fix?
| Work | Indicative cost |
|---|---|
| Battery / alternator check | €30-150 |
| Angle / torque sensor | €150-500 |
| Electric column or EPS module | €500-1,500 |
| Hydraulic steering pump | €250-700 |
| Steering calibration | €50-100 |
Figures are indicative market ranges, useful for orientation: the real cost depends on model, engine, parts chosen and labour hours. For an exact quote we need the vehicle registration number.
How MasterTuning helps
We read the real values of the control unit, not just the code: that is the difference between finding the faulty component and replacing parts by trial and error. After the repair we clear the error and check that it does not come back. Find the nearest centre or contact us.
Is the power steering light on? Book a diagnosis at the nearest MasterTuning centre.
Frequently asked questions
Can I drive with the power steering light on?
Yes with care, but the steering is heavy. Better to have it checked soon.
Why does the light appear after changing the battery?
Sometimes the steering angle sensor needs recalibrating after the battery has been disconnected.
What is the most common cause?
Low battery or alternator voltage, and torque or steering angle sensors.
How much does it cost to fix?
From a few tens of euros for a check to €500-1,500 for an electric column.
