Got the car back in with check engine light. Codes were:


Right O2 sensor, before TWC (KAT), short circuit to postitive/Resistance of sensor heater too low - P0125 - current and stored
Left O2 sensor, before TWC (KAT), short circuit to positive/Resistance of sensor heater too low - P0155 - current and stored

Right O2 sensor, before TWC (KAT), open circuit - P0134 - stored
Left O2 sensor, before TWC (KAT), open circuit - P0154 - stored

If it just says stored does that mean that the fault is no longer there? I guess current and stored means that it is a fault that came up and is still there. These O2 sensors came from AutoZone and were sold based on the model/year application (they were Bosch sensors - just did not capture the number on them). I was under the impression that an O2 sensor was not real complicated. Any thoughts/comments are appreciated.

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Jim