NHTSA Complaint #11591322 — 2020 TOYOTA RAV4

My 2020 Rav4 Limited AWD alerted me that the engine needed maintenance, and, so I parted it until Tuesday, After talking to the service professional at Passport Toyota, they told me about everything else but did not see that the light was on. They did my regular 55,000 miles maintenance on my car. So before driving away, I noticed that the alert was still blinking on my car. Their findings is that the coolant bypass valve/hose etc., has gone bad and is remaining in the open position. Apparently, this part isn't covered by warranty. After reading, there are a lot of years such as 2019, 2018 to name a few having had the same problem. And to fix the problem it is $857.22. Since this problem is occurring in a lot of Rav4's, and I noticed Camry's as well, should they look into why this is happening in a lot of models of their cars, SUV's etc.