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My kenwood radio keeps going into protect mode ive tried everthing i can think of an notin will work

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  • damo mino Sep 04, 2008

    i disconnected all the speakers and amps from the reciever box reset the unit an its still in protect mode!!!!! i put in everthing myself i had the exact same install but wit a different radio and never had any trouble wit it so its been in the car about 2 years problem free!!!! then bought the kenwood and wont work at all!!!!

    i rewired the whole lot re-crimped everthing cleaned the earths and replaced all the wire that had gone bad replaced all the fuses wit the manufacturer spec fuses and even had the unit sent back to kenwood to be fixed but no joy in gettin it back workin!!!!

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  • 726 Answers

What did u try?
let me no and ill help u further

did u install your self?
or install any speakers?
or amps?

Posted on Sep 04, 2008

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I wired up my kenwood kdc-mp336 stereo nd it keeps flashing on the head deck protect how do i get rid of that


It is going in to protect mode(check that no wires are crossed or hooked up wrong)

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Kenwood KDC-MP342U turns on but just keeps saying "reading" when in usb mode. I recently had it go into protect mode and I took the stereo out and checked the wires and re-attached the ones that...


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After driving for about thirty minutes my amp will just cut off, it seems a little hot and then it will turn back on in about 10 minutes. I'm not playing my music loud at all and I have all kenwood...


sounds like your speaker is either the wrong resistance for your amp ie your amp may state 4 ohms and your speaker is 2 ohms which means that the speaker is shorting out the amp and its going into protection mode or the speaker could be burning out and shorting out the amp

May 30, 2011 | Car Speakers & Subwoofers

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My kenwood car stereo went very staticy then quit working and it blinks "PROTECT" on the face


One of your speakers has gone bad. When this happens the speaker can become a short in the circuit. This can burn a circuit up. The radio enters protect mode to protect itself. Unplug a speaker one at a time with the radio turned off, turn the radio on, and see if it works, repeat this until it does work. When it does, you have found your bad speaker. It is possible more than one speaker is bad, so go ahead and test each one.
Alternatively, if you have a multimeter, set it to measure resistance and take a reading across the speakers terminals, if a speaker has no resistance, then it is bad, if it has a very large or infinite resistance then it is also bad. A normal car speaker should be somewhere around 2 ohms to 20 ohms, depending on size and make.

May 05, 2011 | Kenwood Car Speakers & Subwoofers

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I am installing a kenwood cd receiver kdc-mp205 every thing is hooked up but the screen says protect wat is the problem?


Hello.. sorry to hear you are having problems. With the Kenwood car stereos, when they detect a bad speaker in the car, they go into protect mode to keep from burning up the outputs of the stereo. Either you have a bad speaker in the car or a speaker wire that is touching metal (grounded out). You can cut all of the speaker wires loose at the radio and reset the radio. Then turn the radio on and hook each speaker up one at a time until it goes into protect and that will let you know where your problem is located. Hope this helps and good luck with your venture!

20 year car audio/video installer
Bay manager

Mar 14, 2011 | Car Speakers & Subwoofers

1 Answer

My radio is in protect mode and I didn't get any help from the forums posted. My speakers are the standard ones in a car.


i'm assuming it is a kenwood radio. if possible try to check your speakers and speaker wires for shorts, grounds and bare wires. if they all check out you may have a bad output ic.

Oct 25, 2010 | Car Speakers & Subwoofers

1 Answer

My stereo says" protect" everytime i turn it on. can't get anything else.


Hello grammagrisbo, hi your Kenwood head units will show "protect" when there's a problem with the speaker outputs so check to see if the impedance load meets your radio, 8ohms or 4 ohms?. having parallel two speakers on a single channel may cause this dilemma. This might also mean a shorted speaker wire, a blown speaker, or an internal defect in the head unit. Once the condition that's causing the "protect" mode is fixed, the CD player should be back to normal, the next time you turn it on.
If it's staying in "protect", then you'll definitely have to remove the stereo and do something to fix it. Many car audio stores will do system troubleshooting, for a fee. If you want to do it yourself, here's what you need to do:

Pull the Kenwood unit from the dash and disconnect all the speaker wires. power it on and see if the "protect" message displays. If it does, the stereo has an internal defect and will need to be serviced. If it doesn't, then turn it off, and re-connect one speaker only. Turn it on again and see if it will displays "protect" message.

If the radio works with one speaker connected, connect the other speaker to the second channel, you may have now the idea where the problem begun, you will identify the speaker that's causing the problem. There may be a wiring problem or defective speaker in that channel.

If it displays "protect" with a single speaker connected, then disconnect that one and try the other one. If all the speakers cause a "protect" mode, then you're probably back to a defective head unit.

Aug 31, 2010 | Kenwood Car Speakers & Subwoofers

1 Answer

MY KDC-MP3342U SUDDENLY STOPPED WORKING! IT JUST KEEPS FLASHING ...'PROTECT'! REPEATEDLY! HELP!


Protect only comes on when an RCA is grounding out, speaker is blown or the speaker wires are shorting out. Check all your wiring on the head unit and see if all are insulated with tape or better and if there's an exposed wire, tape it up. Make sure that all connections are secured. Then double-check your fuses. Check all of your speakers and their wiring because going into protect mode is the units way of saying you have a problem with your speakers or wiring.

If your speakers and wiring all check out, disconnect your radio wiring harness, and then reconnect the harness. This resets your radio, and your radio should be working again.

If you need to enter the security code, try the default unlock code of 5227.

You can also try to reset your code if the default doesn't work. Try 'KCAR' or '3051'.

Jul 12, 2010 | Kenwood Car Speakers & Subwoofers

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Kenwood kdc-mp25


try this http://www.tech-faq.com/reset-kenwood-security-code.shtml

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