A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- The pump does not build pressure
- Leaks in the AdBlue lines
- Air in the system after repair
What you can do yourself
- Check the AdBlue level and for leaks
- At a service centre: dosing test, if it fails — pump replacement and bleeding
Stop and don’t drive on if:
- The Check Engine light is flashing
- The temperature gauge is in the red or the overheating light is on
- The red oil pressure light is on
- Smoke from under the bonnet, a burning or petrol smell
- Strong jerking, knocking from the engine, or the car barely moves
The explanation comes from the error code reference in the AvtoElektrik PRO app.