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system too lean

  1. Error code bank 1 and 2 fuel lean

    Titan General Discussion
    2008 4w. Has k&n cold air intake, drove to breck colorado and back to the eat coast changed o2 sensor, fuel pump went out on the way there. Fixed that, now back and service engine light came on on the way back. P0174 and p0171. System to lean. Says it's the catalytic converter but not sold on...
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