wassup peeps. i scanned my CEL awhile back and it gave me p1035 oxygen sensor heater bank 1. i had to go state ref so i borrowed my buddies piping and o2 and the CEL went away. i went back to my piping and my "malfunctioning o2" after passing. i ordered an o2 from ebay from primechoice auto parts and its a direct fitment. installed it cleared the code and took off negative terminal to reset the car. went away but right when i start my engine it comes back on and i rescanned it and its the freaken same code i pulled up earlier! i am at a dead end. my tags are outdated and needed to get it smog. i can't borrow my buddys o2 cuz the last time i borrowed it, it died. i don't wanna spend money if the mechanics are going to tell me that its my o2 when i know that already. any help guys?