word1

hi, I own a 98 ex auto civic and yesterday as i was driving home my CEL came on after I made a sharp u-turn. So today I went to autozone to get the codes. I got p1298- Electrical load detector circuit high input, p0135 - problem with oxygen sensor 1, p0141 - problem with oxygen sensor 2, and p0501 - problem with speedometer (speedometer doesn't work now or it bounces around when it does work). I only have about 70k miles and i was surprised to see the cel on. Not only that but now a strange noise is coming from the engine when and after I rev it or accelerate. Also the lights in the dash on my car dim and then keep brightening again when i rev it. And when I was driving home from autozone i had to stop at a red light and when I stepped on the gas to go, the car had trouble accelerating (i think it was having trouble shifting too). I think its probably a problem with the electrical circuit of my car. Is there anyway that I can fix this myself? Thank you for the help!