Where specifically is this o2 sensor located?

2000 MITSUBISHI DIAMANTE
135,600 MILES
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GREGGIS
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Can it be heated with torch and placed in cold water to clean carbon build-up?
Got an OBD code P0135. Definition:
Heated oxygen sensor - bank 1 sensor 1 (H02s11), Heater performance
Sep 6, 2011 at 11:48 AM
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WRENCHTECH
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No, you cannot clean and 0/2 sensor and in this case, that isn't even your problem. The sensor appears to have a burned out heater inside and will have to be replaced. This is the upstream sensor on bank 1 which is the backside of the engine.
Sep 6, 2011 at 2:21 PM