Green key flashing on the dash board

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 Odyssey. That green key light flashing on your dashboard indicates a problem with the immobilizer system. This means the car is not able to detect a registered key. This could be due to a weak key battery, a problem with the key itself, or an issue with the immobilizer system. Try using a spare key if you have one, or replacing the key fob battery to see if that helps. If the light keeps flashing and the van won’t start, a professional diagnosis may be needed to check for deeper issues. 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!