Definitely going to try this when I get the time, it's come back with the hot weather.

 

Quick up date if anyone else having the p0401 restricted flow, did this like 6weeks ago, & fault hasn't come back at all.
Not only that just looked on my dpf app for the 1st time since.
Used to regen at 96% after about every 250 - 300 miles, now it looks like it's already been 362 miles since & it's only. 20% full.
So a lot more soot & gases are been burnt more efficient.

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That does seem right surely??? Mine never regens below 20% or 4g! Sorcery!
Definitely need to find time to clean that bastard up

Edit: actually that worries me, your soot mass measured is 15g, but calc is 4. Usually the calc is way higher than measured, like 10x more.

 

DPF, for 3.0TDI is important oil ash, grams are not important at all.

Max oil ash is 370 ml=0,37 l, so if You have 470=0,47 l, DPF must be changed or cleaned by cleaner not by burning at car.
It is oil ash which is not cleaned by usuall burning process.

I did look at our Q5 3.0TDI with 123000km, Oil ash is 0,16 l.

 

It's not done a regen at 20% that's just when I screen grabbed, it usually regens at around 96% progress bar at top, then after the soot levels go right down.
I'm not sure what the normal level of soot & ash are.
Didn't clean the egr, just the little pipe where joined the inlet was blocked

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So how easy is it to access said pipe to the inlet to clean it? What's involved?

Thanks

 

Take the entire aluminium part of the air intake off, I'd link to the thread that explains but don't have it to hand. Not a huge job, pretty simple from the pictures, though I haven't done it yet.

 

......dont mind this post.......

 

I reckon I fixed this at last by unclogging the intake manifold (was really really funked up around the EGR connection) followed by an EGR regen!

 

Hello , can you explain me more how you fixed it ? Does the solutions from SBONES helped ?

 

Glad it worked [emoji106]

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