Turn off DPF light Mazda 6

swimming in a sea

Hey, I've a Mazda 6 with a flashing DPF light, I just got the NCT done and it passed fine, NCT guy said DPF light nothing to do with NCT. So just wondering does anybody know how i can get the light off?

Is there a fuse for the light i can remove?

dar83

Complete a DPF regeneration cycle maybe?

The light is there for a reason, if it's coming on I would imagine it is trying to tell you that the Filter needs some kind of attention in some way. Have you managed to drive on a Dual carriageway/Motorway with a decent Rev (whatever Mazda states in the handbook) for 15-20 mins solidly?

Removing the fuse may get rid of the light, but if your DPF fails, you're looking at quite a costly repair...

Nissan doctor

swimming in a sea wrote: »

Hey, I've a Mazda 6 with a flashing DPF light, I just got the NCT done and it passed fine, NCT guy said DPF light nothing to do with NCT. So just wondering does anybody know how i can get the light off?

Is there a fuse for the light i can remove?

Yes, rectify the problem that its telling you that you have.


As above, have you followed the proper regeneration requirements?

swimming in a sea

I've had it flashing for a year, I tried all the high rev driving but no luck. I've had a mechanic look at it and he said it makes no odds to the car having it flash and would be very expensive to repair.

MarkR

But the problem with it on is that the problem (I believe) is cumulative. It's only going to get worse, eventually you'll be sitting on the side of the road wishing you got it fixed!

dar83

Well according to the Google search I've just done, Mazda have a lovely way of making the DPF light come on to coincide with the service interval, and even better they seem to be the only ones capable of turning it off.

Did you have the car serviced by a Mazda dealership? Might be your only option to getting it turned off...

That's the likely cause, or else you're using the wrong oil in the car, which in itself can't be good and will also be expensive in the long run!

haulagebasher

You could look into having the DPF removed from the exhaust and getting the ECU patched to supress error codes and the light. It will help your MPG to improve too. While at it, you could also get the EGR system done away with which brings additional benefits. None of this effects NCT but it might be worth hanging onto the removed parts and storing them just in case.

Mar4ix

haulagebasher wrote: »

You could look into having the DPF removed from the exhaust and getting the ECU patched to supress error codes and the light. It will help your MPG to improve too. While at it, you could also get the EGR system done away with which brings additional benefits. None of this effects NCT but it might be worth hanging onto the removed parts and storing them just in case.

DPF been fitted to meet euro 5 emission requirements. if dpf removed, it wont be euro 5 then.
I dont know , do NCT check emissions regarding expected on every car , or there is just one standard for all cars.

haulagebasher

AFAIK, with diesel cars the NCT only measure smoke and do not do anything with NOx or anything else. EGR removal will reduce smoke but increase NOx. They can fail you on visual inspection if emission system is incomplete/assembled wrong, but I know plenty people who have removed these and passed fine. Perhaps the testers just don't go digging around looking for the EGR. In the case of DPFs, usually what happens is that a hollowed out DPF shell is put in place of the filter - this can be your own filter that they rip the guts out of or else if you want to keep your filter for future use they can give you another hollowed out one.

qdef

I had exactly the same with my 2009 mazda 6 ts.I tried a run down the motorway keeping above 3000rpm to no avail.
Anyway, I read on a forum that the DPF light also acts as a oil change service interval warning.
I found this link to clear the light yourself http://www.cdn.dk/mazda6/tips.htm
It worked for me ,however, you do need a helper as you need to connect wire within 4 secs of turning on ignition.
As I stated before this worked straight away for me ,I did this 6 weeks ago,with no problems so far,BUT you obviously do this at your own risk.
Just a quick postscript to this I notice in the service printouts that came with the car,there are a number of entries about clearing this error light, always at service time!Only £49(to clear the fault) at Mazda now thats a bargain!!
If anyone tries this please post your results.
thanks

MetzgerMeister

And the masses think that diesel cars are a cheaper option?? :rolleyes:

dieselbug

DPF regeneration causes the oil to become diluted with fuel.

Some I believe have an extra high mark on the dipstick above the usual max level. This I believe is the max limit the oil level should be allowed to reach. Oil dilution reset is is a routine item during servicing as far as I know.

Take it to a professional who can do a proper diagnosis.

qdef

Surely just checking your oil levels regularly would alert you to any excess fuel generated from an unsuccessful dpf "burn".Maybe i am just showing my age (46)but general car maintenance such as this was(and is)essential to trouble free(ish) motoring.My father was a mechanic and taught me to maintain my own car.
Also, changing your oil(and filter) at regular intervals is vital with modern diesels,which obviously gets rid of any fuel/oil dilution.
As far as "professionals" I have had very little joy from them ,I have been to Mazda 3 times with a fuel problem and a couple of "experts", and finally found a garage that took my opinion into account and has declared I have a blocked injector,which I voiced was the problem, as when I bought the car in March it only had fumes in the tank, and on the 3 mile journey to nearest the petrol station the car started to hesitate and splutter.
Anyway, apologies if this appears as a rant.But I am an engineer who has always serviced his own vehicles with no problems and performed engine rebuilds etc,who is a bit fed up with his choice of car.But it does look good!