[JohnWalsh]

Hi everyone,

Just bought my first Porsche and have some problems already:

My 996 3.4 is getting the following fault codes;
P1124 Oxygen sensing range 1 Cylinder (1-3)
P1126 Oxygen sensing range 1 Cylinder (4-6)
P0441 Fuel tank ventilation minor leak exceeds limit value
P0130 O2 sensor ahead of cat. conv. Cylinder (1-3)

Idles quite poorly, when driving feels normal, at least what I can tell.

MAF and one oxygen sensor has been replaced, no noticeable change.

With my mates Durametric, we got these values;
Oxygen sensing cylinders 1-3 1,00
Oxygen sensing cylinders 4-6 1,25
- after some 10 minutes idle these both go to about same values; 1,03/1,04

FRA 1,03
FRA2 1,04

TRA 0,00
TRA2 0,35

What should I check next (possible vacuum leak)?

Thanks for help.