Bought a car that had a kenwood kdc-x617 radio, but no faceplate. Purchased a facepalte on Ebay, but need to know code.

To reset the code do the following:
1) Turn on the car.2) The faceplate rotates out and the CODE - - - - prompt appears.3) Press >>' and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>' key on the faceplate.5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>' key on the faceplate.6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>' key on the faceplate.7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>' key on the faceplate.8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc.
For further assistance please let me know.

ok I just found this info online and they say it came from the service manual for that stereo so I hope it helps:

You will need a Kenwood RC-410 remote control. This remote works on KDC-519, KDC-X859, KDC-319, KDC-4019, KDC-MP919, KDC-X759, KDC-419, KDC-X459, KDC-MPV619, KDC-MPV7019, KDC-2022, KDC-2022V, KRC-435, KRC-535 and KDC-X959

To reset the code do the following:

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>' and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>' key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>' key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>' key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>' key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc.

Above information source = http://techbybucky.blogspot.com/2008/01/how-to-reset-security-code-on-kenwood.html

It will have to be sent in to Kenwood.

Kenwood Code reset for KDC-MPV7019: (remote required)

To reset the code do the following:

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>| and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>| key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>| key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>| key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>| key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc.


MANUAL for the same radio

If You Have The Remote Here Is Your Solution.

1) Turn on the car.
2) The faceplate rotates out and the CODE - - - - prompt appears.
3) Press >>| and Auto keys simultaneously on the faceplate and hold for 4 seconds. (If the faceplate rotates back into the console push on the upper left top edge of the faceplate and it will flip back around. Press the Eject button and then try it again.)
4) The screen will still say CODE, but the - - - - will disappear! When this happens press the 5 key on the remote twice and it enters a K on the display on the faceplate. Hit the >>| key on the faceplate.
5) Press the 2 key on the remote three times and it enters a C on the display on the faceplate. Hit the >>| key on the faceplate.
6) Press the 2 key on the remote once and it enters an A on the display on the faceplate. Hit the >>| key on the faceplate.
7) Press the 7 key on the remote twice and it enters an R on the display on the faceplate. Hit the >>| key on the faceplate.
8) The radio goes into All Off mode and you are set! Hit the SRC button on the faceplate to select CD, Radio, etc

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Manual

Same problem, different rig. Bought a bronco with a Kenwood KDC 516s in it, Guy had put a new optima battery in it CODE_ _ _ _  appeared and he has no clue what the "code" is. I have no "remote" and no desire to buy a "remote" for a #$%@ car stereo. Is there any way for me to re-set the code w/out the expense of a remote or a fee from a tech?? the musically challenged, Brew
P.S. The owners manual under the "accessory" section  mentions the KDC x617/v-6017 remotes but fails to mention a remote for the 516s?? 

yo tengo un reproductor kenwood kdc-mp2035cr pero este no me reproduce nada solo me sale un mensaje que dice protect y no me deja hacer nada ni colocarle nada por el auxiliar

recently bought a kenwood kdc-815 car radio from a swamp met. bought it with no security code need security code

KENWOOD MADE TWO DIFFERENT EDITION FOR THIS AND SOME OTHER MODELS. YOUR WILL NEED TO CHECK THE SERIAL NUMBER AND YOU CAN CHECK WITH PACPARTS AT pacparts.com THEY WILL GET THE RIGHT ONE FOR YOU