Hello yall I am Kay and i have a 2002 RX300
My problem is a Check engine light that wont go away it came with a friend a VSC light
I ran the check engine code and it was o2 sensor upper air/fuel SO I replaced it $160 pulled the (-) power from the batt then reconnected it then started it back up and BAM! its back I ran the code again it says the same sensor .. I checked the vacume line attached to filter box and its good .. The guy at the store said there was 2 upper o2's but i dont see a 2nd PLEASE PLEASE help thanks
K