Diesel particulate filter??

Help Support Nissan Navara Forum:

Chimo

Member
  • Jun 16, 2016
  • #1
  • Foxtrot16

    Member
    • Jun 17, 2016
  • #2
  • AFAIK the DPF was fitted to the Thai built D40s with an auto gearbox — mine is a 2010 model with a DPF. The manuals weren’t fitted at all (yet).

    Old.Tony

    Administrator
    • Jun 17, 2016
  • #3
  • It’s easy to spot. The DPF is a large cylindrical object under the front passenger footwell.

    If the DPF light is coming on, it means the ECU hasn’t been able to do a clear regen on it for some time. Take the car out to a freeway and sit on a nice steady page (engine RPM > 1600) for a little while. It needs about 10 minutes. Give it 30. If it doesn’t clear the light, you might have a sensor issue. Before going to Nissan, send a PM to ‘auggie’ here, who sells replacement sensors that allow you to remove the DPF without worry.

    ericcs

    Member
    • Jun 17, 2016
  • #4
  • AFAIK the DPF was fitted to the Thai built D40s with an auto gearbox — mine is a 2010 model with a DPF. The manuals weren’t fitted at all (yet).

    stormpatrol

    Member
    • Jul 13, 2016
  • #5
  • dpf cleaner

    HI i have 2 cans of worth DPF cleaner for sale if you want them $ 50 for both need gone i got 4 but only needed 2 so got 2 surplus call me on 0421645104

    Aydan89

    Member
    • Jul 14, 2016
  • #6
  • Chimo

    Member
    • Jan 24, 2017
  • #7
  • Hey guys ended up finding out the car does a dpf and took it to my local Nissan dealer and they performed a regen which fixed the car for about a week but now it’s come back on again :/
    They said something could be causing it but they have to go over the car, they basically saying it’s not actually blocked, but somewhere along the lines it’s getting a false reading could be from anything

    Has anyone gone through this process and can help me shed some light ?
    Cheers Shaun

    Old.Tony

    Administrator
    • Jan 24, 2017
  • #8
  • I’m surprised they didn’t mention that the only possible culprit is the sensors themselves.

    Works like this: there’s a pressure sensor before and after the filter matrix. If the flow through the matrix is good, the pressure on the far side will be very slightly less than the pressure before it (because the matrix itself reduces the volume in the pipe, it causes a small pressure increase because it’s a restriction in the pipe). If the pressure variation rises beyond a certain point it means that the restriction is too large for good exhaust flow and a regen is required. The car tries to perform one and if unsuccessful, lights the DPF light and tries again. Too many failed attempts and the car goes into limp mode and requires the forced regen.

    So the only thing telling the ECU that the DPF is blocking up is the return signal from those two sensors. If the electrical connections are good, the sensors may be faulty and may need to be replaced. Nissan obviously sell them and make a good margin on them, hence my amazement that they didn’t try flogging them already.