2019 Toyota Prius Engine Problems

Your Prius is losing coolant, likely due to a leak in the front exhaust pipe heat exchanger—a known issue covered under Toyota Service Bulletin 0135-19. You'll notice the check engine and engine HOT warning lights are on, and your coolant level is low, even though you don't see puddles underneath. The dealer has identified the problem but the replacement parts are on backorder, so the repair hasn't been completed yet. Fixing this will require replacing or repairing the heat exchanger component in your cooling system.