Trouble with AdBlue, EGR, SCR & Co?

Reading time 3 minutes

Updated – January 10, 2024

Trouble with AdBlue, EGR, SCR, NOx... - workshop visits, invoices with a constantly increasing final amount... - who doesn't know that?

A nice greeting from the engine warning light, the reminder to fill up with AdBlue, the fear of no longer being able to start the engine because the electronics switch to emergency mode and prevent it from starting again, error messages such as “poor AdBlue quality”, – all of this, and much more, is increasingly clouding everyday driving today.

What is AdBlue?

AdBlue - a mixture of around two thirds demineralized water and one third urea, is injected into the exhaust system in the titanium-coated so-called SCR catalytic converter at exhaust gas temperatures above 170 °C. The mixture reduces NOx emissions by converting the NOx into nitrogen and water.
In the diesel scandal it became known that automobile companies had installed an SCR switch-off device that only switched on the NOx control on the chassis dynamometer, but switched it off in road traffic in order to compensate for the increased fuel consumption caused by the NOx reduction measures.

What does SCR mean?

The abbreviation SCR stands for Selective Catalytic Reduction, the treatment of exhaust gases in connection with ADBlue to convert nitrogen oxides (NOx) into water (steam) (H₂O) and nitrogen (N₂).

What does EGR stand for?

AGR means exhaust gas recirculation (EGR – Exhaust Gas Recirculation) and is also responsible for reducing NOx values.
With diesel engines, this process is a balancing act, as fewer exhaust gases are allowed to be recirculated during acceleration in order to avoid soot formation. Since this cannot be achieved mechanically with the speed that would be required, complementary processes such as SCR are used.

Adversity...

What do you do when electronics throw a wrench into your everyday calculations and you have to use the bike or public transport to get from A to B instead of being able to use the “vehicle” as intended?

The problem is further exacerbated by the fact that car dealerships do not receive spare parts for such control devices in a timely manner, some of which have waiting times of over a year, meaning that vehicles sent in for repair cannot be repaired.
Do the manufacturers not have the programming and sensor technology under control?

Customers are becoming increasingly angry, the automotive industry's reputation is crumbling and, assuming they have the necessary change, they are forced to switch to e-mobility. But even this is rarely helpful, unless you just move from socket to socket and stay in one place for at least the charging period. The location can rarely be chosen arbitrarily, because charging infrastructure is not available, functional or the space is not available everywhere.

Adversity upon adversity.

Remedy?

Resourceful specialists can help you avoid the pitfalls of ECU causes. However: – Only permitted for export vehicles for non-European countries –!

Why? Because within the EU the taxation of vehicles also takes emission values into account. The lower the pollutant emissions, the lower the vehicle tax.
If emission values are increased, a higher tax will be due. This is ignored at the moment when the same values are changed, since one does not generate less pollutants, as stated, but rather more pollutants. Remember the “diesel scandal”…

In the following, let's assume export vehicles outside the EU.

Tuning specialists are known from the chip tuning era. A few more horsepower by changing the engine parameters in the software of the engine control units, adjusting various other performance-relevant values, and you have the driving experience you longed for.

Well, the activation of the check engine light, the AdBlue messages and NoX errors are also conditions programmed in the software. These can be influenced by appropriate reprogramming and, for example, the dreaded start lock can be eliminated.

What is interesting is that after reprogramming, consumption even drops in some cases, acceleration improves and exhaust emissions remain almost the same. Of course, all previous quarrels and error messages are now a thing of the past.

If you want to learn more about this topic, this is it company recommended. In addition to a very high level of professional expertise, they also shine with a good deal of friendliness and customer orientation, as well as excellent support with a price structure that is justified in every respect!

For a long engine life...

If you would like to see your vehicle with a mileage of over 300,000 km, that's another option Additive recommended, which on the one hand helps remove slag from the engine and seals all internal surfaces of the engine in the future, thereby minimizing friction losses and wear and thus contributing to a long engine life and - last but not least - reducing fuel consumption.