Author Topic: DPF issues - help!  (Read 388 times)

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Offline Ryaaan40

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  • Body: Hatchback
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DPF issues - help!
« on: February 04, 2020, 09:47:59 AM »
So where do I start?

I’ve had my 1.6 Mazda 3 diesel for around 1.5 years, it’s an 09 plate

To start with, I was driving when I noticed the ‘power train’ light came on and the car went into limp mode, after a couple of google searches later I was onto thinking it may be the dpf.

Step 1 - I booked it into garage #1 for a diagnostic, a little while later they’ve told me the dpf needs a regen, I tell them to go ahead with it and afew hours later they call me back and tell me they aren’t able to do it with there systems and they think it’s a specialist jobby!

Step 2 - I read the Manuel and tried a forced regen myself, so I stuck 1.3 bottles of Wynn dpf cleaner in the fuel tank with around 30 litres of extra fuel and off I set in limp mode keeping above the recommended revs/mph. That did not work neither.

Step 3 - I booked it into garage #2 for another diagnostic, they tell me it needs a regen and continue in with that. It works and my dpf light and eml are cleared and the car feels perfect! 5 days later it’s back into limp mode and showing the same faults as before!

Step 4 - back to the garage it goes for them to tell me they believe it’s the cat temp sensor and they would like to change that and see if that helps, unfortunately that doesn’t work neither and the dpf code is still there!

I’ve asked the garage to try regen it again to take it out of limp mode as it worked before so I can take it in a nice long run to try clear as much as possible, in a hope that works as the garage has said it’s going to most likely need a new dpf at the cost of £800-£1000.

Has another had similar issues or does anyone know any solutions? Or anything I can try?

Offline red_imps_2003

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Re: DPF issues - help!
« Reply #1 on: February 04, 2020, 02:11:51 PM »
Hi. I don't really know what to recommend, I'm afraid. However, I have been mindful of potential DPF issues during ownership of my current car, which is the first vehicle I have owned with one fitted. I can't endorse them personally as I have never used them, but 'DPF Doctor' seem to get positive reviews on their Facebook page and appear to have franchises across the UK. I think they would be my first port of call if/when apparent DPF-related symptoms begin to occur.

https://www.facebook.com/pg/TheDPFDoctor/reviews/

So I was stood there trying to work out why the cricket ball was getting larger and larger...and then it hit me.

Offline audioslaven

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Re: DPF issues - help!
« Reply #2 on: February 06, 2020, 10:10:45 PM »
Hi,

It is possible to clean the DPF. I have taken out the DPF and back flushed it with a wash down hose and refit it. I set the ecu to think it got a new DPF as well. I put up an extra 20K miles after that and I sold it on. The person who has it over a year has no problem. Has the economy gone down? What mileage is on the car?

On my instance the economy was gone down so I hooked up Forscan (free download on the net) with an USB ODBII reader and checked the dpf. I could see it was regenerating every 60 miles when it should be around 300.  The  pressure in the DPF was high as well.
I was getting errors around DPF regen taken too long as well.





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Re: DPF issues - help!
« Reply #2 on: February 06, 2020, 10:10:45 PM »