Hi,
I know there are a few in here that have had their fair share of issues with Dpf. I am nearly at the point of giving up on this and selling the car.
I have a 330d e91 2006. The car has recently developed the yellow Dpf fault 00480a and am experiencing a loss in performance - not really limp mode but acceleration is definitely not what it was. I have Carly but I cannot regenerate as Carly says there are faults which prevent regeneration request.
There were a few faults with the DDE that i have fixed and also both thermostats were replaced.
glow plug errors on 4 plugs
Glow plug module
All plugs were replaced and also the module. All these faults are now gone but I am left with the fault 00420 (or 4020): Exhaust gas temperature sensor before particle filter, signal
I've searched loads of forums on answers, but nothing seems to pinpoint error 4020 on Carly, and I don't know what else I can do to fix this. Don't want to go and buy other sensors unnecessarily, especially as they seem to be reading right.
I thought this sensor was the #1 on real oem as below.
https://www.flickr.com/photos/77837349@N05/51189052041
This sensor I changed, but the fault remains. I downloaded the fault live data (freeze frame) from Carly. I did this after the run, just to check to see if there was any more info on the fault 4020. There wasn't much to shed light on whats wrong.
https://www.flickr.com/photos/77837349@N05/51189056441
engine speed 661 rpm
coolant temperature 30c
rail pressure is 385 bar
injection quantity 8mg / stroke
air mass per cylinder 428 mg / stroke
boost pressure is 1024 mbar
exhaust gas temperature upstream of oxidation catalytic converter 89c
battery voltage 14v
intake air temperature 17c
voltage of exhaust gas temperature sensor in front of particle filter 4980mV
Here I took some readings of the temps on a 30 minute trip from cold to motorway driving. The temperatures seem good enough to perform a regen (I know, the oil is low and some Castrol on its way from Opie)
https://www.flickr.com/photos/77837349@N05/51189056451
https://www.flickr.com/photos/77837349@N05/51189272868
https://www.flickr.com/photos/77837349@N05/51189056446
https://www.flickr.com/photos/77837349@N05/51188350632
Would the 4020 error be in relation to temps or due to back pressure? I was thinking of going down the route of making a small cut in the rubber hose to the pressure sensor to fool the system into regenerating?
Appreciate any help here!