Toyota RAV4 coolant bypass valve failure causing check engine light to activate with air conditioning on Toyota RAV4

Some Toyota RAV4 owners report experiencing issues with the coolant bypass valve, which can trigger the "Engine Maintenance Required" light and the diagnostic trouble code P268115. This problem is known to affect various model years, including the 2019 and 2020 RAV4, and can occur in both hybrid and Prime models. Additionally, the failure of the coolant bypass valve often leads to the activation of the check engine light, especially when the air conditioning system is in use, making it a common reason for this warning. Owners emphasize the importance of accurate diagnosis using an OBD scanner to identify engine problems and determine the cause behind the check engine light activation. Understanding these dashboard warnings is crucial for promptly addressing any vehicle-related issues.