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2006 Kia Sedona Question: Code scan says Banks 1&2 are running lean&rich same time, any sugg. on fixing.

 

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ejf6109, Buffalo, NY, November 18, 2013, 12:14
 Rookie

Scanner reads the following codes PO171-bank 1 to lean, PO172-bank 1 to rich, PO174-bank 2 to lean, PO-175-bank 2 to rich, P2187-bank 1 to lean, P2188-bank 1 to rich, P2189-to lean at idle, P2199- to rich at idle. Replaced air filter, checked for vacuum leaks(none)and cleaned throttle body and MAF sensor, not sure where to go from there, any help would be greatly appreciated.

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    Greg's Orange Auto (12976 Answers) , Orange, CA - (714) 361-9386
    globalhelper November 18, 2013, 12:27
     Master

    LOOK FOR VACCUM LEAK AT INTAKE MANIFOLD AREA

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    ejf6109, November 22, 2013, 13:49
     Rookie

    First, thanks for info, found a cracked vacuum hose, changed out cleared codes, took for ride check engine light came back on, showing codes P0171, P0174, P2187 and P2189, all say Bank 1 & 2 running lean now, any other suggestions on this.

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  • Answer #2

    cardocIII from Gillespie's Auto Service, November 18, 2013, 14:00
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     Master

    Check the cannister purge valve for sticking open. When there are fuel vapors to draw, it can make the engine too rich, when there are no vapors to draw it can make the engine too lean (vacuum leak).

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