Mazda5 DPF help

[Bob1982]

Hi, I had a problem with my DPF filter light flashing last year, the garage did a oil/filter change and a regen but couldn't reset the light (eventually they did after getting an auto electrican to help).. I have since moved so use another garage and the DPF light started flashing again last week, I did an oil/ filter change myself in June, and the garage did a regen for me but they couldn't reset the light either, they want to replace the DPF filter at a large cost. I'm sure it's just the light that needs resetting, there has been no contamination in the oil as the oil level hasn't changed at all. Would I be best taking it to a Mazda dealer to hook it up to there diagnostics, or just pay for the new DPF? Thankyou

 

[flcruising]

What the heck is a DPF?

 

[thaxman]

He's in the UK. My guess is Diesel Particulate Filter.

I would guess that those are designed to last a specific mileage. Going beyond that will affect your MOT I'd bet.

 

[flcruising]

If that's the case, the first paragraph in wikipedia gives a clue as to what the light is hinting at - http://en.wikipedia.org/wiki/Diesel_particulate_filter
If your filter can't regenerate because of your driving conditions (assuming this particular vehicle system is designed like that), you must approach highway speeds above 40 miles per hour (64 km/h) to burn off the particulates. Your owner's manual will give you specific directions that I would refer to as to what you can do as the owner/operator.