VCDS Fault code

[The_Laird]

Originally Posted by MikkiJayne

The only pics I could get of this stuff is either in the bin or on the workshop floor Better to go off the manuals

Unfortunately, I seem to thick to find the right page in the manuals

[MikkiJayne]

I can't find them either

[The_Laird]

Originally Posted by MikkiJayne

I can't find them either

Well, then there’s no hope for us mere mortals if the D2 Doctor can’t find them

[steamship]

Start from page 30 of the following PDF:

SSP 217 V8-5V Motor Audi.pdf

I think when I did mine, I followed the instructions at the following page:

http://www.audipages.com/Tech_Articl...sereplace.html

... and only replace one section at a time.

[The_Laird]

Thanks Sean. Is this what I should order to replace the hose?
https://www.ebay.co.uk/itm/COTTON-BR...edirect=mobile

[steamship]

That looks perfect. Admittedly, when I did mine many moons ago, I opted for blue silicone rubber... just to be different.

[The_Laird]

Originally Posted by MikkiJayne

This code usually happens because the brittle plastic pipe connecting the solenoid valve on top of the bank 2 fuel rail to the two SAI vacuum valves has perished and broken and so they aren't actuating on a cold start. The ECU can see they're not working by the readings from the secondary O2 sensors.

Its simple enough to fix by replacing the broken plastic pipe with standard 4mm braided vacuum hose and a T piece.

Well, she's spot on yet again (see photo below). And thanks to Sean as well for sending me the guide from Audipages.com. I only replaced the plastic pipes that Michaela mentioned as I couldn't get to the vacuum reservoirs without major (for me) dismantling work.

Started it up and the engine management light went away without even needing to clear it!

[steamship]

Originally Posted by The_Laird

I couldn't get to the vacuum reservoirs without major (for me) dismantling work.

That's the ones that failed for me, right at the back of the engine bay. The rubber pipes had gone brittle and were falling apart, and it was literally the braid holding it together.

[The_Laird]

The pipes that I photographed were just plastic - not braided rubber (they are now though!). One had snapped. I re-used the T-connector and will replace the rest of the hoses as and when I need to, or when I have more stuff off the front end.

[MikkiJayne]

Plastic is standard, but many of them have already been replaced by braided hose, probably multiple times.