Mgtf lambda sensor or remap

Hi second post on here, bought a previous members car Toby Whites.

Which Had the following done to it, Zandf remap, tt mk7 exhaust and inclosed induction. From digging around can see it had been rolling roaded, and came out lower than expected 130 ish for a 135 1.8. Digging around with a obdII scanner I can see the following faults P0141 O2 sensor bank 1 sensor 2, lambda sensor and P0340 pending fault camshaft position sensor.



Could either of these be responsible for the loss of power?

From reading around should the O2 sensor have been disconnected with the fitment of the tt exhaust or ignored from the remap?

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