Question about Kenwood KDC-W3534A CD Player

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Security Code for Protect mode

Kenwood KDC-MP438U. I work for a trucking company and have recently installed this model stereo. I had to do some work behind the dash, so I disconnected the stereo, and now that I have re-installed it has went into "Protect" mode. How do I remove the Protect mode. THX

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  • northphilly1 Jul 30, 2008

    protec when i changed battery

    t mode

  • NashuaCD Aug 23, 2008

    Same Problem. Battery went bad and now my Kenwood KDC-MP438U is locked and I need the factory lock code. Help!!!!

  • NashuaCD Aug 23, 2008

    My battery went bad and now my Kenwood KDC=MP438U stereo is locked. I need the factory lock code to use my 5 week old stereo. Help!



    NashuaCD@aol.com

  • rainbowspark Aug 28, 2008

    cd player has come up with the code protect and we've only just bought the car what do i need to unlock it please.

  • marshmell105 Sep 14, 2008

    i just got a new kenwood kdc-mp435u radio and installed it in my car and the portect went on how do i get that off ??

  • pkkettner Sep 14, 2008

    in protect mode

  • ALJORDAN19 Dec 02, 2008

    I OWN A AUTO SALVAGE YARD,,,AND WOULD LIKE TO INSTALL THIS KENWOOD ,,,BUT THE PROTECT CODE KEEPS BLOCKING ME,,CAN I GET AROUND THIS

  • Anonymous Mar 18, 2014

    Kdc-400u kenwood stereo in protect mode

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Turn on the car so the radio is flashing "Protect." Look on the front / removable face of the stereo. On it you will find a small round hole - that's a reset button. Find a small paper clip, unfold the clip and stick it gently into the hole. The "Protect" will stop flashing, and Kenwood will be displayed. Unfortunately all your settings/presets will be gone, but at least the stereo is working again!

Posted on Nov 04, 2011

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  • Franco Salesia
    Franco Salesia Jul 31, 2012

    thx Rob Perry, it realy woks, keep up the great job !!

  • LLORI MARIE DAHLEWIS Nov 28, 2012

    THANK YOU- QUICK AND PAINLESS glad I saw your solution first. Thanks

  • ahmed Aug 24, 2013

    i have tryed many times but still protect sign

  • MOHD ZABALAWE
    MOHD ZABALAWE Nov 11, 2013

    i have the same problim and i dont have reset hole the button inside the hole is for removing the CD.

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How do i unlock the protect mode on the kenwood kdc-mp239

Posted on Sep 24, 2008

  • Parvezalam May 15, 2012

    How to do protect mode

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Solution protect mode kenwood dvd receiver

Posted on May 24, 2008

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Press the reset button, bottom left hand corner :)

Posted on Mar 05, 2011

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Unplug and replug the fuse in the back of stereo

Posted on Sep 14, 2008

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Will all this work on the kenwood model kdc-bt555u

Posted on Dec 15, 2013

  • Paris Hayden
    Paris Hayden Dec 15, 2013

    as i pressed the reset button sounds like the cd player is running

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SOURCE: Protect mode Kenwood KDC MP438U in dash reciever

Anytime there is a short circuit or your battery down low enough you will recieve this signal. If you press the little "reset button" using a small pin or screwdriver your unit should reboot without the "PROTECT" signal. If seeing this "PROTECT" sign is a result of jumping your car, this will fix it. If the signal persists, then there is still a short circuit and you need to check your connection with the battery. Most likely it is touching the chasis or some othere metal.

Posted on Mar 29, 2009

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Protect mode Kenwood KDC MP438U in dash reciever


Anytime there is a short circuit or your battery down low enough you will recieve this signal. If you press the little "reset button" using a small pin or screwdriver your unit should reboot without the "PROTECT" signal. If seeing this "PROTECT" sign is a result of jumping your car, this will fix it. If the signal persists, then there is still a short circuit and you need to check your connection with the battery. Most likely it is touching the chasis or some othere metal.

Jun 27, 2008 | Car Audio Receivers

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