FAO VW or Bentley technicians

[dazzawest1987]

hi all, im after a bit of advice. my boss has got a bentley continental GT, it's got a W12 twin turbo engine, which i know is the same the engine that VW put in the Phaeton so im hoping one of you may be able to help me. his engine management light is on snd come up with the fault code P2438, after a bit of googling ive found it seems to relate to a secondary air injection fault. there was a technical bulletin out about this but it has been carried out already. so if anyone could shed abit more light on this, likely causes ect. it would be really appreciated.
cheers
darren

[spudboy6]

Buy a Haynes manual

They fire hot air In to the engine to warm the cats up when cold , the pipes can become blocked or come
Lose on the drivers side I can't remember where they are as I haven't worked on a gt for a while but believe they run from the air box down by the front inter coolers


Check the pumps fuse but it's a job you need in front of you to diagnose tbh

But Vagcom reads the bentleys fully and you can run all the appropriate tests ect

[dazzawest1987]

Do they do Haynes manuals for bentleys?

Fault code says bank 2, which I believe Is passenger side. Will check pipes and connections see off I can see anything

[dazzawest1987]

Don't suppose you have a rough idea of where the sensor?
Cheers
Darren

[spudboy6]

Don't suppose you have a rough idea of where the sensor?
Cheers
Darren

All I can remember the pump is down the o/s wheel arch , and there common for pipes coming of .

The Haynes manual I was pulling your leg about mate ,

[spudboy6]

Don't suppose you have a rough idea of where the sensor?
Cheers
Darren

All I can remember the pump is down the o/s wheel arch , and there common for pipes coming of .

The Haynes manual I was pulling your leg about mate ,





Gt's the last one I done , see the round pump behind the o/s inter cooler , that's the pump and filter that run up an go near that silver foil on the engine then the plastic pipes run over to the rocker cover on the o/s o the top of my head ,

There are several sensors round the maf and bottom of the inlet manifold . But get in there with brake cleaner spraying looking for air leaks

[dazzawest1987]

Briliant cheers mate, I'll have a look over it saturday

[topher]

was the technical bulletin replacing the vacuum hoses to the combivalves at the back of the heads? if not, thats where i'd be looking first

you might find this useful too, not sure how much of it translates over to the twin turbo http://www.volkspage.net/technik/ssp/ssp/SSP_268.pdf

[dazzawest1987]

It was something to do with pipes  don't know anymore than that to be honest. Will check all the pipes that I can see and get to, the code description says sensor circuit fault though, so think it maybe a sensor or wiring issue, will check on Saturday and see what I can see.

Cheers for the link will have a look at it

Cheers
Darren

[topher]

i didn't google the P code, i never trust those see if you can get a vag specific code out of it. if it is something in the circuit then you'll probably find this document more useful http://www.volkspage.net/technik/ssp/ssp/SSP_250.pdf