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Check engine light came on and checked code and it is p0139 02 sensor ckt slow on 2007 Honda Accord

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Bank 1 sensor 2 please help
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(2) Comments
Either have a shop CONFIRM the O2 sensors function(or lack of) , because certain other causes are possible (though unlikely), OR replace sensor. 4cyl. - second sensor , 6cyl. rear bank second sensor (between firewall and engine)