What this warning usually means
Steady lamp: usually low fluid or an early-stage fault.
Flashing lamp or "urea fault" message with power loss: the system has detected a dosing, pressure, quality or sensor fault and may derate the engine or count down to a no-start.
Can the vehicle still start?
Usually yes at first, though many commercial vehicles reduce power. Ignored for long enough, it can lead to a restart lockout.
Vehicles that show this message
Iveco Daily, Isuzu D-Max, Toyota Hilux/Land Cruiser (some years), Mitsubishi L200 and light trucks.
What we check on site
The technician confirms the right repair after testing. Many faults are fixed on site; some need a part ordered. Mobile call-out from £150 minimum. Final cost depends on the vehicle, location, diagnosis and work required.
- Confirm fluid level and quality with a refractometer
- Read engine and SCR module codes
- Test pump pressure and heater circuits
- Check NOx sensor live data
What to send us on WhatsApp
- Registration number
- Postcode or a location pin
- A photo of the exact warning, including any miles remaining
- Fault code if you have one
- Whether the vehicle currently starts
Related fault codes
- P20E8
- P203F
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