The 51% alcohol percentage needs to be reset, not the O2 sensor.
The timing chain isn’t close to any wires , it just allows the cams enough slack to cause timing issues, once you get the P0172 addressed, we’ll see if any codes come up after that reset.

 

The #1 O2 sensor is the one that determines Alcohol content and rich/lean. When alcohol burns it produces O2. FlexFuel (09-11) O2 sensors are different from 2006-2008. The computer adjusts the timing and injectors to make the O2 level what it is set to be it is trying to maintain the A/F ratio using the amount of O2 coming out of the combustion chamber.

What we were trying to get across is that the word "sensor" in the definition pf P0010-0011-0013-0014 does not mean anything about the sensor. It means the sensor controlled VVT valve or actuator solenoid control. It is one of those mangling of the language for the sake of brevity things
P0016-P0017 have the word sensor in them, but they mean the timing chain needs attention not replace the sensor.

"The 4 cylinder engine has 1 bank so bank 1 just means "the bank".

Another possible cause of P0172 is a cracked exhaust flex pipe, that admits oxygen into the exhaust before it gets to the O2 sensor.