Tip - How to Program a Sentry Key for a PT Cruiser | eHow

Most of Chrysler's PT Cruisers comes equipped with remote keyless entry and a sentry key immobilizer system that immobilizes the engine if anyone attempts to start the car without a securely programmed key. Sentry keys come with a built-in transponder programmed to start only your PT Cruiser. You can purchase replacement keys from your dealer or...