Leon Cupra AUQ 2 fault codes, decat?

[leoncupra2012]

Ive got 17526 and 17522 coming up on my scanner

Oxygen lambda sensor heating - open circuit
Oxygen lambda sensor internal resistance too high

Its got a decat on it, and a full scorpian exhaust, I know theres the 2 sensors in the downpipe/cat , i cant remember if the decat causes both of these , or just one? i cant get under it due to leg problems but just curious as to whats causing it.

Thanks

 

[Allan_84]

both fault is sensor 2 = after the cat.
both fault points to no lambda sensor connected

 

[leoncupra2012]

cheers il try get under it, its low as low can be, but fitting new coilovers tuesday so will have a gander