Exhaust temperature sensors

[Mannings]

Hello.
I have a 2009 +2 as a run around car, got it cheap as it didn't have any paperwork and the previous owners did the bare minimum to it to keep it going . I have had the turbo replaced, but my mechanic said the engine has been changed at some point. It is a nissan (renault) engine but it doesn't correspond to the model of car. He sent it back twice and got the same answer. There are 2 exhaust sensors on this engine, but only 1 on the turbo. So I am left with an engine management light on as the 2nd sensor which I believe goes after the dpf has been tied to a hose in the engine bay. Is there a way to remove this sensor from the ecu or can I somehow splice it into the one that is connected if they are for detecting the same temp obviously. Thanks very much for any help.

[QashqaiSilver]

You could drill the exhaust and put a thread insert for the second sensor or as you mention wire it to the first sensor in parallel.