Both door signals showing both doors open and only one is open cant even crank

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I’m sorry to hear you're having trouble with your LS430. If your dash is showing both doors open when only one is, there may be an issue with one of your door courtesy switches. Close both doors and see which door ajar light remains on to isolate which side may have the problem. A common issue is that the rubber covering of the switch wears down and no longer contacts the door when it closed. Not being able to get the car to crank could be related but is likely a separate concern. I would start by connecting a scan tool to see what codes are stored in the system. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!