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Discussion Starter #1 (Edited)
A couple of weeks ago I drove my car into a flood now my check engine light reads P0172. Honda dealership told me it is fuel system running too rich but everything still drives the same and they told me to replace my 1st O2 sensor cause it is dead. Can a dead O2 sensor make my car run rich? I heard something like my car is on close loop, Is this true?
 
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