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1996 Lexus SC300 Question: Car will throw fault code p0401 only after fueling but not everytime.

 

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Mick Fix It, 3.0L 6 Cylinder, Dunnellon, FL, May 10, 2012, 09:57
 Rookie

Changed egr valve vac Modulator and ox senors. I even changed gas cap.

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    Greg's Orange Auto (12984 Answers) , Orange, CA - (714) 361-9386
    globalhelper May 10, 2012, 12:48
     Master

    THESE CAN BE VERY TRICKY, DID YOU CK PORTS TO SEE IF THEY ARE PLUGGED WHEN EGR WAS OFF. YOU MAY ALSO HAVE A SENSOR ISSUE

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