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Particle filter, soot mass negative

acegne

New member
Location
Yes
Car(s)
Golf GTD mk7.5
I was checking particle filter soot mass values and notice that after regeneration measured value goes to -11.5g and before regeneration it was 9g.
Does anybody know what would cause this and if adaptation of ash mass will fix this?
 

Mark_Sk

New member
Location
Slovakia
Car(s)
Vw Passat
I was checking particle filter soot mass values and notice that after regeneration measured value goes to -11.5g and before regeneration it was 9g.
Does anybody know what would cause this and if adaptation of ash mass will fix this?

Hi acegne,

I have the same readings on passat tdi, year 2018. I think differential pressure sensor may be damaged. When dpf is regenerated, response to accelerator pedal is poor and slow.
 
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