Car makes clicking noise while parked then drains battery and can't start

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! A constant clicking sound when parked suggests something is trying to run even when your Toyota is off, likely draining the battery. This could be caused by a faulty relay, a bad connection, or even a security or accessory module that isn’t powering down. First, try to trace where the clicking is coming from under the hood. An electrical draw test can also help identify the source if the problem persists. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.