P0332 Error code and Oil change msg.

What is your question?

I got an Oil change msg on my 2004 Tahoe and about 2 hrs later I got a check engine light. I know that this code is for the knock sensors, but is it possible that this is tied to the timing of the oil change warning? I also question this too because of a YouTube video where the vehicle that they replaced the knock sensors and it actually also fixed the guys oil meter that was not reading prior to the knock sensor replacement. Before I try to walk through the pain in the butt replacements of these sensors should I first try the Oil change solution first? (Only ask because I am partially supporting my sick mother and am in a money crunch until I can get that second job.) Any help/thoughts on this would be greatly appreciated. Many Thanks