I've been running into this code recently on my 2019 Camry. Originally, I read in another forum that having a GPS tracker on the OBD2 port can cause this and other codes as it messes with the emissions computer. That would have been an easy free fix - but once I removed the Bouncie tracker, cleared the code, now the code is back. I'm here in FL, so definitely will get the water pump replaced soon before it gets hot here. This sucks.