Hello all happy DPF equipped Alfa Owners
Recently I got the "Have engine checked message" which turned out to be:
P1219 Excessive Regeneration Time
Average distance between regens was about 60km and with avg DPF temperature at regans at about 89 degrees C.
The filter is reported 99% blocked BUT....
The pressure difference between pre,post DPF is about 10mbar when idling and goes up to about 400-500 when with >3500 rpm. Which leads me to believe that the filter is not really blocked. But the avg temperature of the regens is a bit strange....
Also looking at the DPF temperature while driving reveals very strange behaviour. The temp sensor before DPF shows consistent temperature reading which quickly goes up into the 100,200,300 range but the DPF temperature sensor is showing readings that defy laws of physics. After rising beyond room temperature it jumps from 80 to 43 and from 130 to 30 and maybe 60 and when I stopped the engine and observed it as it was cooled down it even fell to -15 degrees
Which leads me to believe that even if the ECU is not reporting it, the temp sensor looks broken.
Now I have two questions:
1. I have checked online for Fiat part 55199543 and it seems that you can only get the official "Ricambi originali" version which costs about 120Eur where I live. But I sincerely doubt that Fiat/Alfa produces these sensors... My best bet would be Bosch, Delphi or Denso... Does anyone have OE number for it?
2. It seems that the EDC16 ECU thinks that the regenerations of the DPF don't finish properly since the temperature does not go to 600 during the regeneration. So it happily keeps adding clogging percentage when the engine is running (possibly even more rapidly than normal with low DPF temperature readings).
Anyone knows what happens when this goes to and over 100%? With clogging at 99% now I am a bit scared what will happen when I change the temp sensor. Since the ECU will not do a regen on a cold engine and it will definitely count up to 100% until it will get warmed up.
I am a bit worried that the ECU will think that the DPF is gone and will refuse to do a regen now....
There is also the "replace DPF" function in Multiecuscan. Anyone knows what exactly that does? I presume that it resets the % clogging value to 0... since probably people come to get their DPFs replaced when the ECU tells them that this needs doing...
Now I know that this % clogging value is actually kind of bogus statistical value which ECU calculates on unknown number of factors (possibly taking into account the pressure difference, engine load, exhaust temperature, etc...).
So if the "replace DPF" function will simply reset this to 0 I guess that there is no harm executing it if the DPF really is not at fault.... Or are there any other things in the background that also get reset with this function?
Thanks and Best Regards,