Yes you are right, Im sorry, I just thought the Cirrus-engine was the same as it looks the same when you open the hood, and cylinder 1 on the Cirrus 2.5 V6 is rear closest to the firewall in the engine compartment
I replaced the 2:nd sensor on the exhaust being front of the car.
I thought that sensor was P0141 but Im not sure right now.
Either way that error code went away and now Ive got P0134, which I guess is the one beside the upper plenum?
I think I will give it a try and replace it.