2 code 21's with new o2 sensor?

[spartan]

Gotta another problem after I fixed my code 31. Now I have had 2 code 21's for two weeks now. p1035 heated o2, and high voltage? So I ordered a denso o2 sensor and put it in today. The problem should be fixed, but it's still there. What should I look for now? Wiring? Connectors?

 

[Shadow98]

The light isn't going to clear right away. You have to either get the code erased or wait till about the 30th start for the light to clear. I'd say give it about 2 weeks or so and if the light still take it to AutoZone to have it read.

 

[spartan]

I had it checked at autozone after I put the new sensor in, I wonder why that idiot didn't ask me if I wanted him to clear it I did reset the ecu though shouldn't that have cleared the code?