My 07 through a few codes "help"

Hi guys,
Got myself a new 18 and gave my son my 2007 5.7 regular cab. 1st day he owns it check engine light comes on. 1st code P0158 scanner said
O2 circuit high volatge bank 2 sensor.
2ed code P0607...control module performance.
I feel like shit, i had 210,000 trouble free miles. do you think a o2 sensor is throwing the P0607 code or he's going to need a new control module also.
Just looking for some help before we start throwing parts at it...
Anyone have the part number for the bank 2 sensor?
We are not mechanics, and the kid doesn't have a ton of cash.
Any help greatly appreciated.
Thanks in advance for any reply.
Rudy

 

Any type of exhaust leaks before the sensor? I would definitely try and fix the o2 sensor problem first , rareally that ecms go bad

 

Thanks for the reply mastetech, was reading to change the front at the same time?
That's the plan of attack for now.

 

Kind of a update, cleared the -2- codes and followed my son to a friend that works on our trucks. just dropped it off and left. he called and said there are no codes showing and none in the history. he said he checked the converters with a temp.gun and feels there working. this guy doesn't like to through parts at a jod without knowing the problem. now the outside temperature is around 30 degrees colder here in Wisconsin.
I'm thinking this has something to do with it not faulting out. also he says he can get new oem Toyota o2 sensors for $135.00 each. I'm thinking my son should have him put the sensors in since they have never been changed and the truck has 210,000 miles.
A few months ago 1st time the check engine light came on with his scanner ( way better than ours) it showed the truck computer fault. i know he's thinking the computer is going ( he can get that from Toyota for $1250).
So will keep ya up to date, but for now we either pick up the truck with nothing done to it or ask him to do the sensors.