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  • DPF Summary

    I have been to different forums and sites about DPF and have had DPF replaced on my car, I am just trying to summaries what I think to conclude the DPF problem.

    The DPF problem can be mostly caused by 2 conditions:

    1. Vehicle not being driven long enough per trip so the car cannot get enough chance to re-generate the DPF.

    Toyota has tried to address this issue by updating the software to burn more aggressively, I have heard now the temperature is higher for quicker burn. They even fit a manual DPF burn button if necessary.

    2. 5th injector housing carbon up in long term.

    Currently the only way to solve this problem is to clean the 5th injector every 25000km. Spook1205 has done a tutorial on how to do it yourself https://www.youtube.com/watch?v=OdZACWORMMg but I personally would just request your dealer to clean it professionally for free to avoid any damage.

    There are other minor factors can also cause DPF problem eg dust ingress and bad oil used but these tend to be very minor.
    Please correct me if I am wrong.

    James

  • #2
    Number 2 increases issues when number 1 happens.

    Comment


    • #3
      I guess it's fair to say the DPF problem has not been resolved as claimed by Toyota.

      Comment


      • #4
        I read somewhere that dealers are supposed do an ultrasonic clean of the 5th at every second service. But since my dealer doesnt even have an ultrasonic cleaner , i wont hold my breath. maybe they can buy a good one on ebay lol
        2016 GX , in White

        Comment


        • variable
          variable commented
          Editing a comment
          Yes, depends on the service interval, looks like each clean should no more than 25k.

      • #5
        Originally posted by variable View Post
        I guess it's fair to say the DPF problem has not been resolved as claimed by Toyota.
        Yes I know someone with a 2018 Prado that has just been fitted with a new DPF after 40,000 Kms. I wonder what the outcome of the class action will be, there seems to be a pause in proceedings at the moment, I think that Toyota have been asked to provide more information, I hope the court is not holding its breath!

        Comment


        • Spook1205
          Spook1205 commented
          Editing a comment
          DPF failure isn’t correlated with the same time the 5th injector housing builds up with carbon.

        • JohnLynn
          JohnLynn commented
          Editing a comment
          Yes it is the first replacement DPF on this vehicle, he previously had a 2015 model which had two DPF changes, he was really pleased with his new one believing the problem was fixed. He monitored the DPF with first a scan gauge and more recently he has fitted a Chinese android head unit so he can see things much more clearly on a ten inch screen. Although he posted plenty about his previous vehicle's problems this time he has not posted anything on the Prado forum this time. He rang to tell me about the latest issue.
          We were out in my Prado today and I happened to stop somewhere and noticed the rpm at 1200 so I turned on torque pro, I had been navigating previously. The regen was almost finished, (350 Kms from the previous one) and the temperature was not far short of 800 degrees. By the time I had got my brain in gear to take a screenshot it had dropped a bit, I have uploaded the screen shot below.
          Edit, I have just noticed the feedback is 1.07 possibly as high as I have seen it, any ideas please Spook?
          Last edited by JohnLynn; 22-01-2020, 08:01 PM.

        • variable
          variable commented
          Editing a comment
          Spook I am just curious the 5th injector carbon up is a guarantee for DPF failure prior 30k? Unless different type of oil/fuel used?

      • #6

        Comment


        • variable
          variable commented
          Editing a comment
          I drive gently and they replaced my dpf at 25k, but my symptom was white smoke, which I believe the 5th injector was blocked and dripping fuel, I am not sure if DPF was blocked or what.

        • Spook1205
          Spook1205 commented
          Editing a comment
          If the only symptom was white smoke (small amount whilst catalyst was warming up or if driving slowly around town) then it most likely didn’t need changing.
          If it was bellowing white smoke the the catalyst is not heating up and the diesel is going into the exhaust system, then it most definitely needs replacing (if cleaning catalyst doesn’t work).

        • variable
          variable commented
          Editing a comment
          Shrug, since they replaced the DPF and cleaned 5th injector there was no more smoke I aware of. I drive at least an hour every day (minimum 30 min one way on free flow on motorway). Half of the week I get stuck in traffic.

      • #7
        It's puzzling to hear about such different experiences. 3 DPF changes for one person?? Wow! I have an original 2015 GX with 75000klms and not even a hint of a problem. Never had the 5th injector cleaned either, though I aim to do that at some stage (or ask Toyota to). Could some dealers be using dodgy oil or something?

        Dave

        Comment


        • Spook1205
          Spook1205 commented
          Editing a comment
          I did around town at low speed and low boost (whispering out). And during catalyst warm up.

        • variable
          variable commented
          Editing a comment
          OK, but it never had blocked up right? I had the same symptom and Toyota replaced DPF for me and cleaned 5th injector and never had white smoke again. (maybe they didn't replace DPF after all just cleaned 5th injector)

        • Spook1205
          Spook1205 commented
          Editing a comment
          Correct, it’s never blocked up and always burnt out properly.
          They most likely replaced the DPF, many got replaced with symptoms of white smoke alone. This is before Toyota released a more specialised testing procedure.

      • #8
        I have a 2015 Fotuner and have never experienced any DPF symptoms and for the life of me cannot find it. Did not all Fortuners have it? It even went back for the recall and we got paperwork for it and everything. Google is telling me I may not have one? Confused.

        Comment


        • Spook1205
          Spook1205 commented
          Editing a comment
          Have you ever got out of the car and thought you could smell burning plastic?

      • #9
        All Fortuners sold new in Australia have had a DPF.

        Comment


        • #10
          Thanks. No never seen, heard or smelled anything. Where is the DPF? Right up amongst the manifold/turbo?

          Comment


          • Spook1205
            Spook1205 commented
            Editing a comment
            Straight after turbo. Big round looking thing with 2 tubes and 3 temps sensors attached to it.

        • #11
          So FB group saying they receive letters from Toyota will cover the DPF problem for 10 years with unlimited KMs, I wonder if NZ Toyota will follow?

          Comment


          • #12
            Originally posted by variable View Post
            So FB group saying they receive letters from Toyota will cover the DPF problem for 10 years with unlimited KMs, I wonder if NZ Toyota will follow?
            OK just had confirmation from Toyota NZ they will do the same.

            Comment

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