An error code titled Engine Maintenance Required. Visited your dealer appeared on my dash screen. The error code was unable to be removed. I attempted have the car diagnosed by a private auto shop, however no faulty codes pop up. After research online, the problem was determined to be the engine coolant valve, which are faulty on many Rav4s. I eventually get a letter from Toyota for a Customer Support Program regarding the Engine Coolant Valve. When brought in for maintenance, Toyota pulled the error code P268115 which is for an internal failure of the engine coolant valve. However, Toyota will not replace the part due to their Customer Support Program (24TE04) only covering the part for small engine coolant leak[s]. Essentially, Toyota will replace the part for being faulty if it had small leaks, but not if the part itself is faulty. When I asked the service member I was working with stated that this is a known problem and [Toyota] should have just replaced the whole part, but they only do it for small leaks. Currently, litigation is proceeding regarding the engine coolant valve, alleging Toyota knowingly put faulty parts in their Rav4s. I urge you to investigate this claim.