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  • 0patience 09/06/11 1:43 am PST

    Are those the only codes that return?
    DTC P0171 Fuel Trim System Lean Bank 1
    DTC P0174 Fuel Trim System Lean Bank 2
    Check;
    Vacuum hoses for splits, kinks, and improper connections
    Insufficient fuel in the tank
    Low fuel pressure
    Fuel contamination
    Malfunctioning fuel injectors
    Missing, loose, or leaking exhaust components from the HO2S forward
    Vacuum leaks at the intake manifold, the throttle body, and the
    injector O-rings
    The air induction system and the air intake ducts for leaks or for a missing air filter element
    A cracked EVAP canister
    Evaporative pipes obstructed or leaking
    The crankcase ventilation system for leaks
    The HO2S for improper installation and for electrical wires or connectors that may have contacted the exhaust system
    The HO2S signal circuit open, shorted to ground, or shorted to the low reference circuit
    Malfunctioning engine components

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