Pressure Drop between Turbo and Throttle Valve (check D.V.!)

[slogstorm]

Got my vagcom cable and pulled this fault code:
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 35-00 - -

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Is this a known little fix or is it a serious mechanic hell to solve this?
When car idles I can hear a distant siren/supercharged sound, it moves with the rpm's..
I must say I have noticed a bit lack of power on my LC..
Hoping it's not a new turbo cause then it'l be no christmas gifts for my family this year

Anyone experienced this kind of problem? Im not that technical, but I know a thing or two so i'm hoping this is a problem i can deal with myself.

How do i check for vac leaks in the most efficient way?

Best Regards
Glenn

 

[nd-photo.nl]

Sounds like a vacuum leak, check the complete PVC system (do a search, has been discussed many times), + check the connections to the pancake pipe (if you have original setup).

If you dont want/cant do it yourself, get it smoked checked (best way) by a garage.

 

[slogstorm]

Sounds like a vacuum leak, check the complete PVC system (do a search, has been discussed many times), + check the connections to the pancake pipe (if you have original setup).

If you dont want/cant do it yourself, get it smoked checked (best way) by a garage.

My car is original, I only have a CAI kit. What is the pancake pipe and what does a smoke test determine?
Thanks for your reply

 

[BoostHard]

Isn't this the cold weather fault from factory?

That's the code my mates Bora had when we was at Bills last week.
Sure I heard him say its a fault from factory.

 

[slogstorm]

Well, i don't know if that's correct, but im still getting the code for pressure drop between turbo and throttle valve.. I owned this car 2 years ago, and recently got it back (2 months ago)
My earlier experiences with this car is only good. But maybe it has something to do with the cold weather? We've had down to -15C here now, but right now its +7 and heavy rain, going to check if the "siren" is still there when i leave work..

 

[nd-photo.nl]

Pancake pipe sits after the wheel at drivers side (in Uk at least ). Its called pancake pipe because it is "smashed". This pipe connects the upper boost pipe to the intercooler. The hose between the upper boost pipe and pancake pipe is known to leak at the connection.

Smoke test shows where the leaks are, if smoke can be seen, there's a leak

 

[JDUB 20V]

Sounds like a boost leak

 

[Lukej20vt]

Had this fault many times in different customer cars!

- remove throttle body and clean with air intack / carb / brake cleaner, valve doesn't shut enough hence throwing that fault!

 

[slogstorm]

Had this fault many times in different customer cars!

- remove throttle body and clean with air intack / carb / brake cleaner, valve doesn't shut enough hence throwing that fault!

Hey Luke, thanks fyi! Did you have this experience with your leon? And do you know of any diy TB removal/cleaning? Probably going to need a TBA after the cleaning?
If you are spot on i will send you a medal..

Sent from my HUAWEI P6-U06 using Tapatalk

 

[Lukej20vt]

Only need to do that if you have no boost leaks visible. Check the turbo intake pipe. Quite common to split where it enters the turbo!

 

[Lukej20vt]

Yes just remove it clean it, the recalibrate it, don't need to replace gasket!easy todo don't need a guide

 

[inch0408]

are you using the forge 007p?

 

[inch0408]

if you are check that you have the new piston, i had the same issue, the dv leaks. get the new piston (flat bottom) i got mine from fleabay for under £20

 

[slogstorm]

I have the standard bosch one..

 

[slogstorm]

Holy ****.. What does this mean?? Can you see the hose thats cut straight off??? All oily underneath :-( probably the cause of the fault code?

Sent from my HUAWEI P6-U06 using Tapatalk

 

[slogstorm]

Here is another picture... What is this for?

Sent from my HUAWEI P6-U06 using Tapatalk

 

[nd-photo.nl]

Lol you are missing a piece. You found out the problem The piece is part of the PCV system (positive crankcase ventilation), I would recommend to change all PCV related hoses to be sure. Check the site from Creations Motorsport for silicone replacements, which should outlast the OE hoses.

The missing hoses cuases lumpy behaviour and error codes like the pressure drop.

There ya go laddy

 

[slogstorm]

Hell yeah im missing a piece Thank you so much for the info, looked up some silicone hoses and i must say they're quite expensive to only be hoses. Is it dangerous to drive with the hose like that? Cheers

 

[nd-photo.nl]

Not really, but oil fumes wil get everywhere under the bonnet and you wont have max power