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I installed my kenwood kdc mp342u a few weeks ago but didnt set the security code the unit hasnt been disconnected since being installed but it keeps flashing protected when i turn it on i'm guessing its because of the security code how can i reset my unit

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  • 38 Answers

I had the same problem, it was a bad connection. Check all your connections to your speakers and behind your radio. After you make sure all that is in order use a paper clip and press in the reset button for ten seconds and that should do the trick.

Posted on Aug 11, 2009

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2 Answers

My battery died and I had to get a new battery. I can not remember the security code for the car radio KDC-MP342u can you help?


You may have to contact the manufacturer for details on that. Check in your owners manual for the phone number of their customer service. I had a similar problem after changing battery but found the answer right in the manual. Mine was a Kia.

Jan 07, 2017 | Kenwood Car Audio & Video

1 Answer

I have a kenwood car radio /cd my battery recently went and was replaced and the radio is now asking for a 4 digit code which i dont have .I have amanual but nothing is written in the back what can i do ?


You can enter a 4-digit security code which must be used when the unit is removed from the vehicle, or the constant power source is disconnected from the unit. When constant power is restored to the unit, the security code must be entered before the unit becomes operational.
If the code is lost or forgotten I am afraid the unit has to be re-coded by a Kenwood dealer.
Good luck with it.

Mar 26, 2011 | Kenwood KDC-MP342U Car CD Player

1 Answer

I cant find the kenwood factory code for a kdc-mp342u radio


You can enter a 4-digit security code which must be used when the unit is removed from the vehicle, or the constant power source is disconnected from the unit. When constant power is restored to the unit, the security code must be entered before the unit becomes operational.
If the code is lost or forgotten I am afraid the unit has to be re-coded by a Kenwood dealer.
Good luck with it.

Mar 08, 2011 | Kenwood KDC-MP342U Car CD Player

1 Answer

I got a new battery put in my car and now the radio is asking for a security code. I have a Kenwood KDC-MP342U...Please help


you have a code in the back of the manual that you have to enter into the radio if you dont have the manual call kenwood hotline they will give it to you for free

Sep 24, 2010 | Kenwood KDC-MP342U Car CD Player

1 Answer

The screen on my KDC-MP342U just blinks with the word PROTECT


first, check your speakers and speaker wires for shorts, then disconnect power to the radio for a few seconds and reconnect it. if that doesn't work, then you probably have a bad output ic.

Dec 03, 2009 | Kenwood KDC-MP342U Car CD Player

2 Answers

All it says is protect and nothing works what do i do


the protect message flashes on my KDC MP342U radio. I have unhooked each speakers one at a time and reset the radio but the protect still flashes

Nov 19, 2009 | Kenwood KDC-MP342U Car CD Player

2 Answers

Cant enter security


The unit cannot be used if you are not entering the correct security code and there is not a by-pass to the code.

Jun 13, 2009 | Kenwood KDC-X590 CD Player

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