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Discussion Starter #1
My 97 4Runner has been giving me the ol' engine light treatment. The shop that i bring it to replaced the sensors and I still have the problem. I went to another shop and they said that the O2 sensors are fine, so he changed the O2 heater relay and cleared the code that caused the "check engine" condition. A day later the same problem. Does anyone have any ideas???
 

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Discussion Starter #3
The work was done by a s local shop so I'm not sure which sensor it was....You mentioned a gasket....what gasket and where is it located...how does this effect the O2 sensor???
 

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cant reall tell you unless you tell me where exactly is the 02 sensor could be an exhaust gasket etc...
 
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