[blacksapphire440i]

I got a 190F08 Tank ventilation system: malfunction code. what do i do about this?

[dmanb2b]

[blacksapphire440i]

Originally Posted by dmanb2b

cool. ordered the part. why does bmw have faulty valves

[G.Newt]

You might need also need to replace the venturi nozzle as well.

[blacksapphire440i]

Originally Posted by G.Newt

You might need also need to replace the venturi nozzle as well.

venturi nozzle?

[G.Newt]

Originally Posted by blacksapphire440i

venturi nozzle?

They initially replaced the venturi nozzle: https://f30.bimmerpost.com/forums/sh...06&postcount=2

But it turned out to be the fuel breather valve: https://f30.bimmerpost.com/forums/sh...61&postcount=3

I had a 191C02 code, however. But either one can cause DMTL related codes.

[blacksapphire440i]

Originally Posted by G.Newt

They initially replaced the venturi nozzle: https://f30.bimmerpost.com/forums/sh...06&postcount=2

But it turned out to be the fuel breather valve: https://f30.bimmerpost.com/forums/sh...61&postcount=3

I had a 191C02 code, however. But either one can cause DMTL related codes.

okay do you know where i can find a venturi nozzle for a good deal?

[Mikej0h]

Originally Posted by blacksapphire440i

okay do you know where i can find a venturi nozzle for a good deal?

Try getbmwparts or fcpeuro

https://www.getbmwparts.com/oem-part...id-13907643105
https://www.fcpeuro.com/Parts/?keywords=13907643105

[blacksapphire440i]

Originally Posted by Mikej0h

Try getbmwparts or fcpeuro

https://www.getbmwparts.com/oem-part...id-13907643105
https://www.fcpeuro.com/Parts/?keywords=13907643105

you are goated. thank you!

[BoyOhBoyyy]

Originally Posted by Mikej0h

Try getbmwparts or fcpeuro

https://www.getbmwparts.com/oem-part...id-13907643105
https://www.fcpeuro.com/Parts/?keywords=13907643105

Thank you for coming in clutch. Just got the same on the N55 engine a few minutes ago. Going to go with the breather valve first since I've been having the rough idle issue and actually thought it was because of overdue spark plugs. Change plugs but issue persisted. Going to give this a shot with the help of the video.

[BoyOhBoyyy]

Originally Posted by blacksapphire440i

you are goated. thank you!

Normally, in this kinda situation, you still drive the car around while waiting for the part to arrive right?

[blacksapphire440i]

Originally Posted by BoyOhBoyyy

Normally, in this kinda situation, you still drive the car around while waiting for the part to arrive right?

Yes nothing affected my car. Called my mechanic and I cleared the code via Bm3. Still haven't got it back but once I go for my oil change I'm gonna change the breather valve as well. its just an evap code

[BoyOhBoyyy]

Originally Posted by blacksapphire440i

Yes nothing affected my car. Called my mechanic and I cleared the code via Bm3. Still haven't got it back but once I go for my oil change I'm gonna change the breather valve as well. its just an evap code

Thank you bro! Just cleared with bm3 as well and I'll take care of it later then.

[adelF30]

i keep hearing about the venturi nozzle but i cant find the part anywhere? could you please include a link or something, i'm not too well educated with cars

[blacksapphire440i]

Originally Posted by adelF30

i keep hearing about the venturi nozzle but i cant find the part anywhere? could you please include a link or something, i'm not too well educated with cars

https://parts.bmwnorthwest.com/p/BMW...907643105.html

13907643105 part #

[AdolfoMolinaM]

Hello everyone, this may be an old topic but I want to leave my contribution because I did not find the solution online to the fault 190F08.

After 5 months trying to solve the error, I was finally able to solve it. I changed the purge valve, changed the DMTL pump, and checked all the pipes and seals, I also tested it with a smoke leak detector and everything was functional and no leaks.

I literally tried everything and gave up. After I tried everything I could, I ended up taking my BMW X3 F25 2017 N20 to a BMW specialized workshop. What they told me was to change the purge valve (again) for an original and new one. The one I had bought was original but used.

I decided to buy the new one and try again. But after 4 days the CEL Check engine light came back on with the same fault (190F08).

This frustrated me and I decided to check EVERYTHING again. In this case I also checked other additional components and found that the plugs of the two differential pressure sensors were swapped. I realized this because the two plugs have the same connection, they are next to each other BUT one of the plugs (which is after the throttle) has a clip on the cable to attach it to a part of the engine. Since they were in alternate positions, the clip was not attached anywhere and there was no way to hold it. When I saw that, I decided to change their position and look online for a picture of these sensors. There is one that says "3.5" and the other does not say anything. The 3.5 is high pressure so it goes on the intake side before the throttle, and the other one that does not say anything is low pressure and goes after the throttle.

When I changed them according to the internet picture and the correct way of the harnesses, I proceeded to turn on the vehicle and it threw a lot of errors and turned off. Then with ISTA software I reset the ADAPTATION VALUES of the DME so that it would recalibrate the sensors, the fuel mixture and the EVAP system.

And BOOOM, problem solved.

I think this is a common issue because the sensors look the same, have the same connection and are close to each other.

This whole problem was because some workshop swapped the sensors after disassembling that area of the engine and recalibrated the DME to work that way.

I hope this helps someone who is having the same problem.