My car is running lean and rich all over the place via my wideband. So I get code 33 and I change the sensor with another know or I think I know good sensor.SO after I replaced it and now Im still getting a rich and lean condiction. I keep getting code 33 this o2 thing is driving me crazy when I go into Diagnostics MODE II and the ecu nor the check engine light will not blink for either side. SO i cant tell whats going on! It should blink so many times in 10 seconds!