An engine warning light means the ECU has detected a fault in the engine or emissions system. If it is steady you can carry on carefully until a diagnosis; if it is flashing, stop the vehicle as soon as possible.
Most common causes
- Clogged DPF/FAP
- Dirty EGR valve
- AdBlue/SCR system fault
- Faulty lambda sensor
What to do right away
- Check whether the light is steady or flashing.
- Check fluid levels and the fuel cap.
- Avoid high revs.
- Have the fault codes read with a diagnostic scan.
How MasterTuning fixes it
We run an electronic diagnosis, identify the fault code and fix the root cause. Contact MasterTuning: we operate throughout Italy with our installers.
Frequently asked questions
What does the engine warning light mean?
It indicates a fault detected by the ECU. Steady: drive carefully until a diagnosis. Flashing: stop right away.
Can I drive with the engine warning light on?
With a steady light, carefully until a diagnosis; with a flashing light it is best to stop.
How do you switch the engine warning light off?
By fixing the cause and clearing the fault code with a diagnostic tool.
Engine warning light on: what are the most common causes?
The most frequent causes are: clogged DPF/FAP; dirty EGR valve; AdBlue/SCR system fault; faulty lambda sensor.
