The engine warning light means the ECU has detected a fault in the engine or emissions system. If it is steady you can drive carefully to a diagnosis; if it is flashing stop as soon as possible, as it indicates a serious problem (possible catalytic converter damage).
Most common causes
- Clogged DPF or incomplete regeneration
- Dirty or stuck EGR valve
- AdBlue/SCR system error (recent diesels)
- Faulty lambda sensor or pressure sensor
- Intake leaks or spark plugs/injectors
What to do now
- Check if the light is steady (caution) or flashing (stop).
- Check levels (oil, AdBlue) and the fuel cap.
- Avoid hard acceleration and high revs.
- Read the fault codes with a diagnosis: the only way to know the exact cause.
How MasterTuning solves it
At MasterTuning centres we run the electronic diagnosis, find the fault code and fix the root cause: DPF cleaning/regeneration, EGR restoration, AdBlue correction and ECU optimisation. We operate across Italy.
Need a diagnosis? Find your nearest MasterTuning centre for a professional check and a lasting solution.