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-   -   Question on BMW 3-Series E36 O2_Sensor (http://forums.pelicanparts.com/101-projects-discussion-forum-bmw-3-series/766935-question-bmw-3-series-e36-o2_sensor.html)

Boys (guest) 08-20-2013 04:57 AM
My BMW 320I shows the engine warning light any displays a code 4F when checked with the diagnsotic tool,description for the code is O2-sensor heater behind catalytic converter,bank 1,engine performance is very poor, what can i do?

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This post was auto-generated based upon a question asked on our tech article page here:

Nick at Pelican Parts 08-20-2013 04:57 AM
This could be a failing oxygen sensor. Check that the exhaust system is sealed and there are no other problems influencing the o2 signal. If all else is good, replace the o2.

- Nick


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