I would give it a 30% chance of opening up by turning add blue back on.
But if you can program it yourself worth a try.
If you paying sombody I would just take the filter out and remove dpf from the programming.

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Thanks for great answare. Im paying someone, so i suggest to take it out. My erlier ML 2010 did not have adblue, but never problem with the dpf. Sems to be another Construction for the never dpf`s (for adblue cars)

Regards.

 

They are not taking the tailpipetest, so it will pass the inspection. We can legaly take out the filter, but we need to report to the authority, so the car get higher tax without the filter.

 

Im not an expert, but many people today tell me that removing adblue has nothing to do with clogging dpf, as adblue threat exhaust gass after dpf… What du you mean? I still mean the clogging dpf have to do with removing adblue..

 

My 2014 BT350 has broken NOX sensors now for the last 10,000 miles. So that means the DEF system has not worked. And yet my DPF is working just fine, therefore confirmation that the DPF is not related to the DEF.

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Okey, thanks for reply Your case is a bit different. When deleting adblue from ecu (like i did), dpf will stop regerating. A broken nox sensor, may stop adblue, but not stop the dpf`s regen process. Do you get any erros Messages in instrumet cluster by the broken nox sensor?

 

Just the usual Check Engine light. I just ignore the check engine light at this time, there is no emissions testing here in Texas for diesels. I may eventually either crawl under the vehicle and replace the NOX sensor or pay someone to do the DEF, EGR Delete and eventually do the DPF delete as well. I tried a last week to replace the NOX sensor but was not successful due to the heat shield being in the way. I may attempt the replacement again in the near future.