Hello i am new to this forum and the boxer engine. Can anyone help me try and locate where the wireing is for the up pipe oxygen sensor ? The person who i brought the car off or one of it previous owners has removed it and hiden the wire in the engine bay or got ride of it completely i have no idea which and qould very much like to reinstall the item as i have 2002 bugeye wrx that needs to stop showing the check engine light after a hearty drive. Any help would be appreciated thank you in advance