as above fault code 17564 manifold abs pressure sensor circ any idea guys?

Any more details?  It sounds like the MAP sensor saw over or under boost but usually it says whether boost was lower or higher than requested,  Or at least VCDS will.

N75 fault, boost control, gone into limp home mode.

Edited 27 November, 201312 yr by sepulchrave

limp mode yes switch engine off and back on boosts for a few seconds then back in to limp mode 

Edited 27 November, 201312 yr by steveopc

map sensor first then vacum box and hopefully BOOST!

map sensor first then vacum box and hopefully BOOST!

 

So not the N75 boost control solenoid then? Seems like the MAP sensors working fine. What's a vacuum box?

Edited 27 November, 201312 yr by sepulchrave

Vacuum box IS the N75 - Its that black box in the top left over the O/S suspension strut with 6 vacuum pipes coming off it.

 

I would imagine its sensing overboost/underboost for other reasons - eg: sticky turbo vanes = overboost - leaking boost pipe joint = underboost.  I wouldn't start changing the sensors telling you there is an issue - go fix the issue the sensors are telling you is happening.

Vacuum box IS the N75 - Its that black box in the top left over the O/S suspension strut with 6 vacuum pipes coming off it.

 

Ahhh, was caught out by the 'thingummyjig' description, was racking my brain trying to figure it out 

http://www.ebay.co.uk/itm/251385941076?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

had new hybrid turbo from turbo dynamics no boost leaks as i know this is an issue especially off the turbo also u can hear them trying map sensor today will update. cheers guys 

map sensor we have BOOST!!!! :P