I brought my car into auto zone they said that i needed to get an upstream o2 sensor. On a side note my car wasnt running very good!
so then i ordered a bosch universal o2 sensor and installed it. A week later the engine light came back on so i went back to auto zone and it poped a different code. this one says o2 sensor heater?? but this time my car is running better. what do i do?? sorry for the long rant.

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