the car is going straight into limp mode.
Newly fitted Dpf is blocked and will not regen. fault code P246b (conditions not correct for regeneration).
the pdf new rubber sensor pipes (Old ones had split).
does my car have a diesel vaporiser ?or what else could cause the regen to fail.
My garage fitter can't see a fuel vaporiser do all mk4 diesels have one?
ecu values were cleared . how do we test the sensor. think it works as it is saying that the pdf is blocked
Hi Brian, checking the sensor. there are only two wires to the unit not 3
can you advise
yes 2 pipes lead to the DPF from the bulkhead sensor
the fitter was looking at the temp probe from the dpf which had 2 wires.
The DPF sensor has 3 wires as described. the white & violet wire has no reading on ignition on or idle.
DPF is currently off the vehicle so pipes are not connected. do we need to read with dpf fitted and sensor pipes connected?
thanks for the quick response again.
reg is RO59AZN
ok thank you.
we have 4.9 on pin 3
pin 1 showing 0.4
good morning Brian
with pdf fitted and hoese connected the readings are
1.ignition on 0.4
2. engine on idle 1.2
3 300rpm fluctuatiing 1.7-2.0 difficult to maintain a steady rpm.
will check with my garage guy .
he did say that the ecu settings were all reset prior to fitting the new DPF.
will check for intercooler leaks,, any other obvious checks to make ?
thanks again. ***** with a passion same problem on a 330d few years back and removed the pdf
want to find out the cause this time.
3-400 miles it was completely blocked.
All settings were cleared when fitted according to the instructions on the new DPF unit.
just spoke with my fitter . He's a good guy very experienced. Scratching his head on this one still.
Checked for leaks and theres nothing obvious. He has opened the erg and it looks clean and functional. No codes are showing for the egr on the snap-on computer he uses.
The readings on the DPF sensor are now.
ignition on .5
Showing a code of PO42d Catalyst temp sensor
Circuit high bank sensor
circuit 2 pending dtc
I guess we need to manually clean the dpf. How best to do this ? any advise would be great.
do i renew the catalyst sensor