Advice needed

daveyjp

DPF is a complicated system. The filter itself needs to be treat as a consumable.

However replacing just the filter may work, but if there are also faulty sensors if these haven't also been replaced they will simply continue to destroy new filters.

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mcpitman

Sounds like a faulty DPF or sensor on the DPF, or potentially blocked EGR.

I have never had to run my diesel at high revs to "clear" the DPF, I too do regular motorway miles, but do use Millers additive every tank.

Some people think these additives are a con, but factually based, without the additive, my Insignia does a regen twice per tank of fuel. With the additive this is once per two tanks of fuel.

macman

£400 for a new DPF including labour is very cheap. Are you sure the part fitted was new, or 'recon'?

shinytop

This just convinces me even more never to buy a diesel. I never rally liked them but the mpg/BIK swayed me for my company cars. Not with my own money though. I'm thinking of starting a new business when I retire and have come up with this ad for it:

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iwb100

I have a Euro 6 diesel and a Euro 5 - and an earlier diesel too all with DPF. Only ever once had an issue and that was with first generation DPF.

The revs aren't that critical to be honest just long journeys - car can do active regeneration so long as engine on long enough and at high temperature long enough. The passive regens need about 20 minutes continuous driving above 40mph. Its really not that hard to do.

Diesels are not suitable as "run arounds" they need one journey a week on fast roads for relatively long distances at least. But it isn't hard for most commuters to never ever have a problem with DPF.

Jonesya

mcpitman wrote: »

Sounds like a faulty DPF or sensor on the DPF, or potentially blocked EGR.

I have never had to run my diesel at high revs to "clear" the DPF, I too do regular motorway miles, but do use Millers additive every tank.

Some people think these additives are a con, but factually based, without the additive, my Insignia does a regen twice per tank of fuel. With the additive this is once per two tanks of fuel.

There's some logic to it - many of the diesel additives contain cetane improvers, diesel with higher cetane value ignites better and so should burn more cleanly, similar to some of the more expensive premium diesels which have a higher rating.

You can buy generic, neat cetane improver.

https://en.wikipedia.org/wiki/Cetane_Improver