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    RUSSELECK's Avatar
    RUSSELECK Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 12, 2008, 01:14 AM
    Check engine light
    Hi everyone, I have a 91 honda civic si that I have replaced the o2 sensor on and the check engine light still won't go off. Can any one help?
    novaman's Avatar
    novaman Posts: 21, Reputation: 4
    New Member
    		  
    #2

    Mar 12, 2008, 03:32 AM
    You need a scan tool to verify it was a faulty 02 or something else. You will also have to reset the ECM. It won't do it by itself.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #3

    Mar 12, 2008, 03:04 PM
    Disconnecting the negative battery cable for 10 seconds will reset the ECM.
    topladyj's Avatar
    topladyj Posts: 323, Reputation: 13
    Full Member
    		  
    #4

    Mar 12, 2008, 03:05 PM
    Agreed disconnect the battery cable and it should go off. If it comes back on after reset there is another problem somewhere. Good luck!
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