High voltage oxygen sensor

I need help please.
I got a 2006 Chevrolet Aveo, when it is hot, the oxygen sensor voltage rises, the injectors, the fuel pressure regulator, all the sensors have excellent operating ranges.
The oxygen sensor and cooling temperature sensor are replaced.
Try with a module of another car and the problem persists. The canister valve is disconnected and remains the same.
When the engine reaches normal operating temperature, the SCAner shows me closed loop and at times the loop opens, at that precise moment the regulation of long -range fuel is negative lowering to -34 and the sensor voltage of the O2 sensor begins to rise to 1,300 MV.
someone who can help me?

It would be good that you disconnect the sensor or oxygen sensors while presenting the problem to see that MV marks in the scanner is supposed to be about 450 MV to also subrude the problem is internal in the ECU.