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Guest
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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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08-20-2013, 04:57 AM
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Moderator
Join Date: Jul 2012
Location: New England
Posts: 3,189
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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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08-20-2013, 04:57 AM
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