Check Engine Light on 2001 Chevrolet Silverado?

[jeremy_ton]

My 01 Chevrolet Silverado is throwing a CEL code for a bad knock sensor in bank 2. I've replaced both knock sensors and 6 months later, many resets later, and 6000 miles later, the code is still there. P0332 is the code. My old sensor was corroded and water was obviously the problem. But the code never went a way, even after clearing, so I don't think the problem is water this time. Is it timing? Is it bad spark plugs? Engine runs great and no obvious problems besides this light on my dash. Thanks for your help.
And please, do not tell me to just take it to a shop. That isn't what I'm asking for here.