Removing the check engine will do nothing without resetting the Denox system, and this function is not in every diagnostic program. Once the engine has started, the pump must have a constant pressure of about 4 bar, if I remember correctly. The injector is a simple solenoid valve that lets the pressure out momentarily. Once the system has been pressurised, so that the pump does not grind air, it is sometimes necessary to blow lightly on the AdBlue filler cap while the pump is running, despite such a function in the computer. The error, the momentary drop in performance etc. appears in all with Euro 6 exhaust standards, whether Audi, Porsche etc.
Added after 2 [minutes]: .
Removing the check engine will do nothing without resetting the Denox system, and this function is not in every diagnostic program. Once the engine has started, the pump must be at a constant pressure of about 4 bar, if I remember correctly. The injector is a simple solenoid valve that lets the pressure out momentarily. Once the system has been pressurised, so that the pump does not grind air, it is sometimes necessary to blow lightly on the AdBlue filler cap while the pump is running, despite such a function in the computer. The error, the momentary drop in performance etc. appears in all with Euro 6 exhaust standards, whether Audi, Porsche etc.
Added after 6 [minutes]: .
>>21442723 .
All you need is a removed injector a syringe hot water and current12v
