Chevrolet: computer engine codes, computer engine, o2 sensor

Question
I was also told that this code will come up if there is a problem or weak fuel pump. The o2 sensor had just been change about 1 month ago and the truck still does not run right. Is there any possibility that it could be the computer or the injectors. I am out of ideas
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-----Question-----
I have a 1996 chevrolet pick up and I have had the codes read when the check engine lights comes on. It reads that there is low voltage to codes numbered p0131 and p0151. I have phoned my local Chev dealer to find out the codes ment but they would not tell me what they ment because there service technician was to busy to help me
-----Answer-----
Blair;
Hi  sorry for taking so long to get back to you , the p0131 means the - 02 circuit low voltage bank 1 sensor 1.
p0151- 02 circuit low voltage bank 2 sensor 1.

Answer
Blair,HI well it could be  a lot of things , I do not understand why when you got the codes the first time that  it was  on the computer ,  that is the purpose of it to tell you what is wrong.It could be plugs, or fuel filter , map sensor. I would put the meter on it to find out what it is. or go to a new shop.  ok ....>>..>