C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

DPF workaoround

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Old 06-17-2020, 04:59 AM
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c250 2.2 cdi
DPF workaoround

I'm searching for a way to trick the ecu to sense that there is no soot in DPF and doesn't need to start regeneration.
As I seen the c250 cdi w204 has only 2 sensors on DPF , one differential pressure sensor and one temperature sensor. So, if I can make the differential pressure sensor signal to have a certain value (like 0,01) and the temperature sensor signal have a certain temp reading( like 200 degrees) then the regeneration should not start ever right ?
Can anyone tell me how to find the sensor value that triggers regeneration ? Am I missing something ?
Old 06-19-2020, 02:31 AM
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c250 2.2 cdi
Any ideas on the subject ? nobody tried this before ?
Old 06-19-2020, 06:58 AM
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Ummm there's alot wrong here..

If you prevent regens the dpf will block .

Giving a differential pressure sensor too a low reading will make it think it has a leak and go into limp mode .
Old 06-19-2020, 03:06 PM
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c250 2.2 cdi
Originally Posted by Gazwould
Ummm there's alot wrong here..

If you prevent regens the dpf will block .

Giving a differential pressure sensor too a low reading will make it think it has a leak and go into limp mode .
In normal working condition dpf differntial presure is between -0,01 and 0,02 acording to my readings with delphi ds150 .
Yes blocking regeneration will block dpf , but also can be a workaround if dpf is empty ( no ceramics inside).
Do you know if there is any other sensors that contributes to soot level calculation , or only the differential pressure sensor does the job ?

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