Hello guys I need your help for something , so 2 days ago I was driving on the highway around 63 mph I try to accelerate fast so i press the acceleration pedal all way to the floor and the car it wasn't accelerating at all. It was just the sound of the engine trying to accelerate but it was like I was pressing the gas pedal and leave it ! I try to accelerate slow and everything is good it was accelerating but slow it's like some of the horses under my hood died!!! Lol! So I went to auto zone and connect my car to the computer so I have a code (I don't have it with me this time) but it was about heated oxygent sensor in bank 1 and one other code for bank 2 ! I am gonna order online the sensors but I don't know what kind do I need I am gonna change both of them but make me confuse if I need up stream or down stream , and which one go to bank 1 and which one to bank 2 !!! Thank u for your time to read this thread