2001 5.3 p0131 p0151 after changed o2 sensors-Help!!

[Awesomeness]

Hello all, I am having an issue I cannot get to go away. Recently I purchased a 2001 silverado with the 5.3. After driving for about a week, My truck suddenly became a dog under partial throttle and the service engine soon light came on. It would do fine under full throttle. I got it home and read the codes. I got a p0131 and a p0151. The p0131 is low voltage bank one sensor one o2 sensor. p0151 is bank 2 sensor 1 low voltage o2 sensor. I didn't see anything obvious. I replaced the o2 sensors with Denso brand o2 sensors. I then erased the codes. I drove it for about 50-60 miles and it came back. I checked the codes. Same ones!! At this point I'm lost. Can anyone help me?

[anumber1]

Check the wiring carefully. It us possible to have that code with a broken wire.

[Awesomeness]

Okay will do. It seems to act funny too. Like its missing power and at times doesn't want to downshift and at times has no mid range power