I recently been having a whole lot of problems with my car hesitating and has been going on for a while but not as bad. Then the other day I was driving and the check engine light came on and when I shut it off and turned it back on the light went off. The next day I checked the code that was saved on the ECU and it was code 1, which is the heated 02 sensor. I checked all the connections that the helm's said to check with this type of intermediate problem but everything turned out o.k. I still have the same hesitation as always but no CE light anymore. So my question is should I go ahead and replace this even though the light is no longer coming on? Do you think that this would solve my hesitation problems also?