2017 W205 DPF Issues

[MarcusBHP]

DPF issues, cleaned DPF but still shows 400% full. Will Xentry fix this? I tried with THINKDIAG but it does nothing with DPF except reset DPF pressure sensor.

 

[Peter5]

You can try resetting the DPF adaptation with Xentry as a first aid. Usually there is a reason why it is marked as full, further investigation may be useful.

 

[MarcusBHP]

Thanks for the reply, once I can get Xentry loaded on the laptop I'll definitely see what Xentry can fix, I have an Openport clone ready for that.

 

[Quin]

After setting up Xentry, try to force a regeneration and see if the readings for ash, soot, etc. go down.

 

[fetteblutzn]

Check the pressure sensor for air flow. Also check all hoses/hard lines from and to the sensor. If one line is open or blocked, the sensor will always show the DPF is full.

 

[aujibe]

This helped me, the problem was in the NOx sensor.

 

[prcak2005]

Can anyone explain what is the real use of these diesel additives like DPF, AdBlue, NOx etc. I won't explain what they do but what is their use other than many car owners often have problems with them and the cost is very high. I think their only purpose is to take some money from car owners.

 

[Peter5]

To meet the necessary emission standards, you simply need to have them if you want to make or sell cars. Before EU4/EU5, there was only EGR and DPF. EU6 emission level means that EGR and DPF are not enough, you also need SCR. SCR is the system for “AdBlue” and NOx is the emissions it reduces. All of this comes from emission standards. If we want to reduce emissions in general, then cars have to comply with them. It’s just a fact, whether we like it or not.

The systems have problems, like all car technology. People don't see the point in fixing the systems because they have an attitude problem. Why would I spend money on something I'm not going to get in return? If I spend $700 on an LCD TV, I can watch Netflix all night long. If I spend the same on a NOx sensor, all I get is a rebuilt emissions system for the car (I don't see the difference). They said, "do not own anything you are not able to fix or get fixed".

 

[BigNode]

The purpose of installing a particulate filter and urea injection after the particulate filter is to reduce the harmful effects on the environment and reduce the temporary impact on health. The particulate filter traps solid soot particles from diesel combustion, and urea allows nitrogen oxides to decompose into water and carbon dioxide, which are safe for human health. Particles that are not cleaned after the particulate filter can cause cancer in humans. The NOx sensor is designed to assess the effectiveness of urea injection into the selective catalyst.

 

[prcak2005]

The picture shows an example of a faulty NOx sensor that needs to be replaced with a new one, and the cost is about 500 euros. My point is that all these emission reduction add-ons are very expensive and, besides, it is good for the environment, but it is a way to take extra money from car owners. Do trucks have such systems, do they have problems?