Oxygen sensor

Hello everyone, I am new here, I have a Hyundai Accent 2000, supposedly ... 1.5,
a few days ago, I had to change the escape manifold and not the mechanic did not find the same type of engine, I found only one without Catalitical, and put that one, but, it throws me codes of llos of oxygen sensors, in addition the car does not pass the 3000 rpm because it is stopped and the engine is scratched ... The strange thing is also that the feeding of the oxygen sensors are 12 volts, but when I measure the feeding it sends me a super high voltage of 22 volts ... (it was not so before) I do not know if I would have damaged the computer ..., I do not know if someone could get the manual and workshop of the Hyndai accent 2000. Thank you very much in advance

Hello, the Landa probe has 4 white cables 1 Black 1 gray The probe is not feed on current is a current generator depending on the oxygen inside the exhaust tube but it has a 12V aliementation for the heating resistance that has connected in the two white cables since the others are signal The probe is not well connected, the one that gives it importance the ECU is the first the other after the catalyst is to know if the same catalyst is working well, something else the voltage measure