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1997 Toyota Camry Question: What could be next thing cause EGR system fail.? Code p 401.

 

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nickico, 2.2L 4 Cylinder, Renton, WA, April 02, 2012, 11:24
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I checked EGR valve ,replaced EGR modulator and vaccum switch valve.
But engime light still on after running for couple miles.Some one know about this give me advice what is the possible part cause this problem.Thanks e.

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  • Answer #1

    Miles Auto Services (884 Answers) , Richmond, VA - (804) 885-4176
    milesauto April 02, 2012, 12:49
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     Master

    The things that need to be checked and items that can cause this code are listed.
    Engine Control Module (ECM)
    Restricted Exhaust Gas Recirculation (EGR) Passages
    Dirty Throttle Body
    Vacuum Modulator
    Vacuum Switching Valve

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