P2015 error code

[Aj09TSI]

Hi all

On my way home last night and my emission control light came on, no flashing and so I proceeded to drive a little more civilised.

Pulled over and switched engine off and turned it on a few minutes later.

Light is still on so I ran the scanner and this came up.....

Screenshot_2015-06-22-18-17-57_1.jpg

My car is the Passat 2.0 TSI sport 2009 with a stage one remap.

Reading a few forums and found that it could be either the sensor or the intake manifold that could need replacing, but I could be understanding it wrong!

What I would like help with is
1. Are there any upgraded parts for this repair job?
2. Any reputable reliable VW specialists garages in North London / Enfield area.
3. And while it's getting repaired any recommendations for replacing/upgrading any joining parts.

Thanks peeps in advance for any help!