Newbie with issues!

[LeedsLeon]

I've just bought a cable and got a copy of VAG COM.

I ran my first test on my 2001 Leon 20VT and it came up with these errors which it actually displayed

17705 Pressure drop between turbo and throttle valve
17545 Fuel trim bank 1 (add): System too rich

And these which it wouldn't display because of it being a sharware copy, but I got the codes off this site.

16514 02 sensor Circ., bank 1 - sensor malfunction
17978 Control. Module locked
17956 Boost pressure control valve open
18010 Power supply (B+) Terminal 30 Low voltage

Now it would appear that the cable I bought is a bit too cheap (£16 off ebay including shipping form Hong Kong!) to reset the codes and all were displaying 'intermittent'. I also recently changed the N75F valve for an N75J and a Forge007DP which I did together with the battery disconnected and since its seemed more economical, yet a lot quicker.

So, which should I take notice of and how can I cure them?

Thanks!

 

[m0rk]

1) your lambda probe is dead (primary) so get that replaced
2) put the original N75 back on.

 

[LeedsLeon]

to be honest I think the old N75F had bitten the dust. Should I get another F rather than the J I've put on? I've seen lots of debates on here about them.

So what difference is th J making to my car rather than th F as it is more responsive and picks up a lot better since the change or is it just me thinking it is?