strange negative dpf back pressure reading??

elbutio · 04-05-2015, 03:16 PM

Hi there, just completed a full service on my 330d LCI (N57 engine) and thought I'd check out dpf condition with a back pressure test through DIS and get readings of -999 mbar. Doesn't seem right to me and very different to my previous 330d??

Screenshot from dis:
http://s4.postimg.org/9oa2qah8t/Phot...6_43_29_pm.jpg

Any light shed on this would be appreciated, as far as I'm aware it seems to regen ok

Aragorn30d · 04-06-2015, 06:29 AM

i guess its saying the sensors broken or the measuring block your reading is incorrect or doesnt line up with the ECU properly.

Leah1 · 04-06-2015, 09:30 AM

It's dis that's the problem, not sure why but it doesn't read it correctly I've had this issue

elbutio · 04-06-2015, 11:06 AM

Thanks Leah, thought that may be the case, any ideas of it reads correctly with BMWwhat on an LCI as I'm considering getting this and definitely will if it works??

Leah1 · 04-07-2015, 06:09 AM

im not sure to be honest, maybe ask in the thread that's on going here

04-05-2015, 03:16 PM	#1
elbutio Private 7 Rep 91 Posts Drives: 335d F31 & 330d E91 Join Date: Mar 2011 Location: UK iTrader: (0)	strange negative dpf back pressure reading?? Hi there, just completed a full service on my 330d LCI (N57 engine) and thought I'd check out dpf condition with a back pressure test through DIS and get readings of -999 mbar. Doesn't seem right to me and very different to my previous 330d?? Screenshot from dis: http://s4.postimg.org/9oa2qah8t/Phot...6_43_29_pm.jpg Any light shed on this would be appreciated, as far as I'm aware it seems to regen ok
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04-06-2015, 06:29 AM	#2
Aragorn30d Lieutenant Colonel 175 Rep 1,596 Posts Drives: E90 330d Join Date: Mar 2015 Location: Fife iTrader: (0)	i guess its saying the sensors broken or the measuring block your reading is incorrect or doesnt line up with the ECU properly.
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04-06-2015, 09:30 AM	#3
Leah1 First Lieutenant 28 Rep 323 Posts Drives: 320d m sport Join Date: Jan 2013 Location: Space iTrader: (0)	It's dis that's the problem, not sure why but it doesn't read it correctly I've had this issue
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04-06-2015, 11:06 AM	#4
elbutio Private 7 Rep 91 Posts Drives: 335d F31 & 330d E91 Join Date: Mar 2011 Location: UK iTrader: (0)	Thanks Leah, thought that may be the case, any ideas of it reads correctly with BMWwhat on an LCI as I'm considering getting this and definitely will if it works??
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04-07-2015, 06:09 AM	#5
Leah1 First Lieutenant 28 Rep 323 Posts Drives: 320d m sport Join Date: Jan 2013 Location: Space iTrader: (0)	im not sure to be honest, maybe ask in the thread that's on going here
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