need a lil help

ok this is my third time taking the X for the stupid 02 sensors bank 1 and bank 2 the replaced them twice already and my check engine light keeps popping up and it throws out the same codes the 02 sensors. what can cause the 02 sensors to toss out a code. my uncle said it can be my intake thats throwing them off. can some of u X gurus fill me on my its doing that cuz its making the burn alot fuel

 

Did the CEL come on? What code, if any from the OBDII scanner?

 

Are the only codes pulled for the P2 sensors, or are there other codes also? Some of the readers I've seen will only show the last code, you have to force it to retrieve older stored codes.

 

What specific codes are you getting?

What aftermarket modifications do you have on the truck?

G

 

it throw bank1 sensor 1 low voltage and bank2 sensor 1 high voltage and i only have a intake