DPF Pressure Sensor causing bad MPG?

[ToyotaGang]

I found this forum where a Lexus i220d had the same issue and has the same engine like us. He solved it with toyota techstream app

https://www.lexusownersclub.co.uk/forum/topic/107523-potential-fix-for-is220d-white-smoke-smells-of-diesel-poor-mpg/#comments

[Mariosskoutaris]

Hello,

Did anyone tried / find anything else?

I think my problem is one of the injectors as i can hear it knocking between 2k-2.5k revs under load.

[ToyotaGang]

I still have the issue. But mpg has gotten higher and smokes alot less. 

[Infiniti]

Nothing has really changed for me, I reckon it smokes a little less than before. However MPG hasn't changed.

Due to the sky rocketing fuel prices in the UK, I've given up chasing stable MPG at all with my Auris, and I'm just enjoying the power it has. I'm sorry I couldn't be of any more help!

 

[Mariosskoutaris]

Hey everyone, 

Just a quick update for everyone. Took my car to a diesel specialist here in Cyprus and the guys there told me it wasn't my injectors and that its my dpf being almost full due to city driving and in desperate need of cleaning and that's what the smoke is and the knocking i hear from the engine are the injectors spraying more fuel to bring up the dpf temperature. 

I made a dpf cleaning appointment this Monday and lets hope that its fixable and i wont need new dpf.

[ToyotaGang]

Ok. Keep us updated. Btw my car still has thr issue

 

23 minutes ago, Mariosskoutaris said:

Hey everyone, 

Just a quick update for everyone. Took my car to a diesel specialist here in Cyprus and the guys there told me it wasn't my injectors and that its my dpf being almost full due to city driving and in desperate need of cleaning and that's what the smoke is and the knocking i hear from the engine are the injectors spraying more fuel to bring up the dpf temperature. 

I made a dpf cleaning appointment this Monday and lets hope that its fixable and i wont need new dpf.

 

[Mariosskoutaris]

Guys, Finally i came to the bottom of this and the short answer is DPF delete.

soo after many months of struggle and many different diagnosis finally my mechanic found that the DPF differential pressure sensor is acting weird meaning that it would mostly show correct values and then out of nowhere be all over the place and that what was causing all of this and I'm really happy I came to the bottom of it.

beware that It is very sneaky because it wont show that its faulty.

Toyota quoted me 500euros for a new sensor and i cant find a used one and since here in Cyprus its not that big of a deal to do a DPF delete and i can still pass MOT then i will go ahead and do a delete and keep you guys updated 

[Infiniti]

On 12/8/2021 at 12:46 PM, Mariosskoutaris said:

Guys, Finally i came to the bottom of this and the short answer is DPF delete.

soo after many months of struggle and many different diagnosis finally my mechanic found that the DPF differential pressure sensor is acting weird meaning that it would mostly show correct values and then out of nowhere be all over the place and that what was causing all of this and I'm really happy I came to the bottom of it.

beware that It is very sneaky because it wont show that its faulty.

Toyota quoted me 500euros for a new sensor and i cant find a used one and since here in Cyprus its not that big of a deal to do a DPF delete and i can still pass MOT then i will go ahead and do a delete and keep you guys updated 

I came to the same conclusion, although it's illegal here so my pursuit has stopped! Loads of places offer it, but if Police or an MOT tester find out, it's a £1000 fine...

Although I would be interested to find out how they do it, I was changing my control arms yesterday and noticed that the DPF is vertically mounted in the engine bay above the subframe, so to actually remove it, open it and gut it would be a huge amount of labour! So if you could let us know how the process went and how long it took, I'd be very interested to satisfy my curiosity!

Thank you!

[Mariosskoutaris]

1 hour ago, Infiniti said:

I came to the same conclusion, although it's illegal here so my pursuit has stopped! Loads of places offer it, but if Police or an MOT tester find out, it's a £1000 fine...

Although I would be interested to find out how they do it, I was changing my control arms yesterday and noticed that the DPF is vertically mounted in the engine bay above the subframe, so to actually remove it, open it and gut it would be a huge amount of labour! So if you could let us know how the process went and how long it took, I'd be very interested to satisfy my curiosity!

Thank you!

Hi, actually here its one day to remove and gut it about 150euro and 300euros for the dpf delete which also requires 1 day.

Which comes to 2-3 days max and about 450 euros

[Mariosskoutaris]

Hey guys, i hope i find everyone well.

Just an update on everything.

My car had more problems than expected but finally it came to an end

Despite the sensor being bad and the DPF delete being done to the car the car wasn't running right and we pulled the injectors out and found that 2 out of the 4 were bad and one of the two was so bad that it leaking gasses through the copper seal and essentially my car was loosing compression because of it(it formed like a carbon seal and it was stuck and snapped in half when we pulled it out).

Anyhow we changed all seals and 2 injectors and finally it runs like a dream.

If anyone is interested in more details feel free to ask 

I hope everyone merry christmas and happy holidays!

[Infiniti]

15 hours ago, Mariosskoutaris said:

Hey guys, i hope i find everyone well.

Just an update on everything.

My car had more problems than expected but finally it came to an end

Despite the sensor being bad and the DPF delete being done to the car the car wasn't running right and we pulled the injectors out and found that 2 out of the 4 were bad and one of the two was so bad that it leaking gasses through the copper seal and essentially my car was loosing compression because of it(it formed like a carbon seal and it was stuck and snapped in half when we pulled it out).

Anyhow we changed all seals and 2 injectors and finally it runs like a dream.

If anyone is interested in more details feel free to ask 

I hope everyone merry christmas and happy holidays!

Did you by any chance get a photo of the injectors? Did you have to replace them, or did you manage to get them restored?

[Mariosskoutaris]

48 minutes ago, Infiniti said:

Did you by any chance get a photo of the injectors? Did you have to replace them, or did you manage to get them restored?

They told me that they couldn't restore these kind of injectors and instead they had put 2 used ones but in very good condition.

I only have a picture of the snapped one