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  1. #1
    700rpm (Idle)
    Join Date
    Jul 2011
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    20
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    Akaroa

    The dreaded fault code 21, Vtec spool valve.

    This fault throws on the engine light randomly between the revs of 5000-7000rpm in my d16y8, sometimes not at all when the car is semi cold.

    Any idea what tends to go wrong with these? Short or open circuit in solenoid, sticky valve?

    Any helps much appreciated.

  2. #2
    Team NZH: Order of Merit bmgjet's Avatar
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    Jul 2007
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    Location
    New Plymouth

    Re: The dreaded fault code 21, Vtec spool valve.

    Code 21 V-TEC control solenoid.
    Eather the plug is lose or you need a new solenoid.

  3. #3
    700rpm (Idle)
    Join Date
    Jul 2011
    Posts
    20
    Location
    Akaroa

    Re: The dreaded fault code 21, Vtec spool valve.

    I'm not sure if the d16y8 is a vtec-e motor or just typical vtec, as it seems the motor rev's out fine without loss of power, yet it hesitates at lower rpm..... So vtec may still be engaging, so could be just higher enough resistance to fault at higher rpm. It's a little weird how it doesn't seem to throw the light at a set rpm.

  4. #4
    Exclusive Member 6,000rpm (Max Torque) samk115's Avatar
    Join Date
    May 2010
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    1,695
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    Dunedin

    Re: The dreaded fault code 21, Vtec spool valve.

    As bmgjet said, check the plug. if its not loose try a new solenoid. Should fix you right up.
    Quote Originally Posted by Green Machine View Post
    Nzhondas. Its serious business.

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