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    manney0001's Avatar
    manney0001 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 7, 2013, 07:35 PM
    How fix p0171 code on 2000 lexus
    The engine light is on for a while after test for emission the following code is shown;

    p0171
    p0440
    p0441
    p0446
    p1130
    What can be done to get fix? Any help
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Feb 7, 2013, 09:31 PM
    Download the codes for those numbers and start from there. Each thrown code is for a specific problem or a set of problems. P1130 is air fuel ratio. You can also Google "lexus code-----" and get the answer
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #3

    Feb 9, 2013, 08:29 AM
    There is likely two different faults with this combination of codes.
    The P0171 is a lean code and the P1130 is for an O2 sensor. This will require an experienced drivability technician to determine what has failed since a failing O2 sensor can cause the ECM to reduce fuel and cause the system to go lean. But a vacuum leak can cause the ECM to do the same thing and the O2 sensor is only reporting the fact. Clear as mud yet?
    Have this fully diagnosed before replacing any parts.
    The other codes (P04xx codes) are for EVAP system faults and may reequire a separate diagnosis.
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