Question about 2004 Cadillac Deville

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Code po171 caddy 2004 deville - 2004 Cadillac Deville

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  • roytheman Oct 25, 2008

    Actually I had a plenum chamber gasket that was leaking. Replaced gasket and problem solved.



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This code is to inform you that your fuel mixture on bank 1 is set or running to lean.

Posted on Oct 24, 2008


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Lean bank 1&2,have replaced intake gaskets and throttle body seal,new fuel pump,still sets po171,po174 codes-help

Did you Erase the diagnostic trouble codes after the repairs were made? If not then they will keep coming back on screen as stored trouble codes untill they are removed from the computers Memory.If you did Erase the codes then you need to disconnect the possitive battery terminal this will reset the computer. Good Luck.

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