Hello guys

I posted these details in another section by mistake I think. I'm a newbie to d.i.y and I have the engine management light on my skoda 4 x 4 1.8T. I took it in to skoda and they said it was a leak in the vacuum hose, but at the time they were too busy to locate the problem. They reset the fault and let me be on my way.

I've since got vagcom and have taken these readings:-

VAG-COM Version: Release 409.1-S

Chassis Type: 1U - Skoda Octavia

Scan: 01,02,03,08,15,17,19,35,46,56

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Address 01: Engine

Controller: 06A 906 032 HJ

Component: 1.8L R4/5VT 0002

Coding: 10700

Shop #: WSC 31480

TMBSL21UX28540845 SKZ7Z0A1023982

3 Faults Found:

17544 - Fuel Trim: Bank 1 (Add): System too Lean

P1136 - 35-00 - -

17608 - Boost Pressure Control Valve (N249): Mechanical Malfunction

P1200 - 35-00 - -

17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)

P1297 - 35-10 - - - Intermittent

Readiness: 0000 1001

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Address 03: ABS Brakes

Controller: 1C0 907 379 F

Component: ESP ALLRAD MK60 0104

Coding: 0023174

Shop #: WSC 31480

No fault code found.

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Address 08: Auto HVAC

Controller: 1U1 907 044 A

Component: CLIMATRONIC C 2.0.0

Coding: 01000

Shop #: WSC 31480

No fault code found.

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Skipping Address 15-Airbags

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Address 17: Instruments

Controller: 1U0 920 911 B

Component: KOMBI+WEGFAHRSP VDO V03

Coding: 23412

Shop #: WSC 07893

TMBSL21UX28540845 SKZ7Z0A1023982

No fault code found.

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Address 19: CAN Gateway

Controller: 6N0 909 901

Component: Gateway K<->CAN 0001

Coding: 00006

Shop #: WSC 31480

No fault code found.

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Address 46: Central Conv.

Controller: 1C0 959 799 B

Component: 3Y Komfortger

The 17608 and 17705 sound like a faulty diverter valve (DV). I had the same go on mine, and I understand it's quite common for them to fail. I got a new one from VAG Parts for about

will thanks ever so much. this sounds spot on - I'm getting the whistling + the spluttering changing gear. Did this improve on performance when you got it sorted?

Thanks again

Phil

is the DV the N75 valve?

nope the N75 it just next to it afaik its the one with a cable going into it

No, the N75 controls the wastegate. I got very confused when I first started looking into this but when I eventually got it clear in my head, I posted my conclusions here.

You can find a picture of the DV by going to vagparts, "entering the shop" and searching for "dv 710n" (without the quotes). The second and third items (both the same part under different labels) are the ones you want. There is also a third connection that you can't see in the picture - it's on the top/left surface - where a thin vacuum line is connected. This vacuum line is pointing upwards when the DV is installed in the car.

I haven't noticed an improvement in performance, but the fluttering has stopped and I think this must be good news for the turbo.

i stand corrected. good read there.

Hi again

I ordered and replaced the dump valve and everything was ok for 3 days. I then filled up with super and the engine management light has come on again. could I have busted the diaphragm on the new valve just by going super? There's a cheap aluminium valve on ebay I might consider as this will eliminate any pressure issues. I bought this car 12 months ago, so don't know if it has been remapped or not. i'd have expected a replacement dump valve though. how can I check this with VAG?

I'm not really qualified to say, but I can't imagine the diaphragm could have been broken by using a different type of fuel, remapped or not. You could always test the new valve by sucking on the vacuum line, as I described in my first reply. My money's on a different fault - see what fault code VAG COM reports.

vacuum leak from the breather hose to the rifgt of the dipstick (as you look at it), carefully move it with the engine running and listen for the hiss.

Hello

sorry for the delay posting back. I got 2 error codes and now just at the last minute a MAF error has appeared.

VAG-COM Version: Release 409.1-S

Control Module Part Number: 06A 906 032 HJ

Component and/or Version: 1.8L R4/5VT 0002

Software Coding: 10700

Work Shop Code: WSC 31480

Additional Info: TMBSL21UX28540845 SKZ7Z0A1023982

3 Faults Found:

17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)

P1297 - 35-10 - - - Intermittent

17544 - Fuel Trim: Bank 1 (Add): System too Lean

P1136 - 35-00 - -

16486 - Mass Air Flow Sensor (G70): Signal too Low

P0102 - 35-00 - -

hi all ive fitted a k and n induction kit and a bailey atmospheric dump valve on my octavia. the other day it just died and went into limp mode ive purhased a code reader and it comes up with codes 17608 17705 17743 reading up these sound like the dump valve causing proplems any one offer advice on this, thanks jason