Some faults - related?

[J749]

Hi guys,

Please bare with me, Im very new to VAG COM and this is my first go at fault finding.

So my brothers '51'plate 1.8T Leon threw up the engine management light, and after a quick scan with VAG COM it produced the following:

3 Faults Found:
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 35-00 - -
17545 - Long term fuel trim add fuel (bank 1) system too rich
P1137 - 35-00 - -
16795 - Secondary Air Injection System: Incorrect Flow Detected.
P0411 - 35-00 - -

Now, Ive done a bit of research and it seems like they are common faults.

my main question is, do you think these could all be tied in together? eg. one fault is causing all 3 errors?

Im thinking maybe a split pipe somewhere could cause all three?

any help on where to start my search would be much apreciated!

Oh btw, I assume im fairly safe to turn off the light and drive the car on whilst I figure out whats wrong?

Thanks in advance guys

Edit: the DV is a forge one and was replaced not long ago and the car appears to be driving fine!

 

[meltonlad]

check this out...

http://wiki.ross-tech.com/index.php?title=Category:Fault_Codes&until=02071

hope it helps.

 

[gezmeister]

I had 17705 and 17545 too, along with another. Upgrading the dv took 2 away, but now it's on again. Have yet to check what i have this time!