Engine Management

[Huw1285]

Hi all,have a little problem with my ibiza and was wondering if anybody has any ideas thalt help me.

I have been lacking boost the past few days, plugged the vag com in today and had the following codes

16514 - o2 sensor circuit malfunction ( bank 1 sensor 1)

16795 - secondary air injection system

17763 - cant find what this is,dosent say in manual

HELP PLEASE

 

[truCido]

16514 - Ok sounds like you've got your precat lambda gone?

16795 - Have you done the N249 bypass?

17763 is Cyl 1 ignition circuit open circuit

 

[Huw1285]

Whats the damage on one of them sensors?? easy to fit? any way of testing before i change it?

Whats the n249 bypass???