This article covers everything you need to know.
If you've ever disconnected your car battery or had it go flat, you've likely encountered the frustrating "CODE" message on your dashboard. This anti-theft feature is designed to prevent unauthorized use of your stereo, but it can be a major headache for owners.
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: This is usually found on the radio itself or on a sticker on the side or back. For car radios, you might need to remove the radio from the dashboard to find it.
Most radios will permanently lock (showing "WAIT" or "LOCKED") after 3 to 10 incorrect attempts.