Differential pressure sensor voltages (blocked DPF)
24-03-2014, 08:54 PM
#1
PassionFord Post Whore!!
Thread Starter
Differential pressure sensor voltages (blocked DPF)
Does anyone have any data to prove what the differential pressure sensor signal voltages should be on a blocked (or clear) DPF please?
I'm assuming the dpfe sensor is a 5 volt reference, so I've probably answered my own question, but should it show a low or high voltage when blocked?
Cheers.
I'm assuming the dpfe sensor is a 5 volt reference, so I've probably answered my own question, but should it show a low or high voltage when blocked?
Cheers.
24-03-2014, 11:02 PM
#3
PassionFord Post Whore!!
Thread Starter
Hi, probably should have added more info, but in truth the question as I've asked it above is what I really need to know.
Have a Transit I'm looking at 2011 2.2 fwd that the turbo has seized and it's broken down up the road, I'm pretty sure that the DPF is blocked with what I assumed is turbo debris/oil. I can remove the 02 sensor from the front pipe pre DPF (It's a Euro5) and the van will run as I'm venting the exhaust, but with the 02 sensor in place, the van struggles to start, won't rev etc. (Bearing in mind the turbo has seized, I know it won't run properly etc etc)
I was told previously by Ford technical that the soot accumulation figures in IDS datalogger aren't very accurate.
For future info I'd like to know what voltages should be seen at the differential pressure sensor to prove how blocked or not a DPF is.
Have a Transit I'm looking at 2011 2.2 fwd that the turbo has seized and it's broken down up the road, I'm pretty sure that the DPF is blocked with what I assumed is turbo debris/oil. I can remove the 02 sensor from the front pipe pre DPF (It's a Euro5) and the van will run as I'm venting the exhaust, but with the 02 sensor in place, the van struggles to start, won't rev etc. (Bearing in mind the turbo has seized, I know it won't run properly etc etc)
I was told previously by Ford technical that the soot accumulation figures in IDS datalogger aren't very accurate.
For future info I'd like to know what voltages should be seen at the differential pressure sensor to prove how blocked or not a DPF is.
Last edited by GVK.; 24-03-2014 at 11:11 PM.
24-03-2014, 11:07 PM
#4
PassionFord Post Whore!!
Thread Starter
This probably answers my question it's for a Freelander tho.
http://www.freel2.com/gallery/albums...83/FL2_DPF.pdf
http://www.freel2.com/gallery/albums...83/FL2_DPF.pdf
NOTE:
A relatively clean DPF will return a voltage of
approximately 0.5V. This rises to approximately 4.5V
for a full DPF.
If the differential pressure sensor returns a voltage
of 4.5V or more to the ECM, and if all other
conditions are met, regeneration of the DPF will
occur.
In the event of a fault, the engine power output is
reduced by the ECM by means of a reduction in the
injected fuel quantity and EGR will be switched off
A relatively clean DPF will return a voltage of
approximately 0.5V. This rises to approximately 4.5V
for a full DPF.
If the differential pressure sensor returns a voltage
of 4.5V or more to the ECM, and if all other
conditions are met, regeneration of the DPF will
occur.
In the event of a fault, the engine power output is
reduced by the ECM by means of a reduction in the
injected fuel quantity and EGR will be switched off
Last edited by GVK.; 24-03-2014 at 11:12 PM.
