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    Aj04's Avatar
    Aj04 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 8, 2010, 02:07 PM
    Ck engine light and disconnect EFI really
    I have toyota Sienna 98 Replaced the O2 sensor and Ck engine light cokme again for same code PO155. Erased the code severalt times still comes back.
    Is Disconneting the EFI Relay will erase the code ?
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
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    #2

    Mar 8, 2010, 05:09 PM

    Which 0xygen sensor did you replace exactly? No to the EFI relay question.
    Aj04's Avatar
    Aj04 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Mar 9, 2010, 03:44 PM
    Quote Originally Posted by kitch428 View Post
    Which 0xygen sensor did you replace exactly? No to the EFI relay question.

    Bank2 Sensor 1 ( there are two in front and this is Rear one - which is kind if Hard to Reach ) before cat
    What possible solution be ? I have already replaced the front and donwstream before. I used to get code PO133 before then I replaced the front Maifold and Code cleared but this rear one PO155 even after replacement still come on after short drive .
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