I have a 2006 Jaguar and engine coolant low light came on The light on the dashboard was red and said engine coolant - Answered by a verified Jaguar Mechanic We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our Jaguar XJ8: A light came on saying Engine Coolant Low. I A light came on saying Engine Coolant Low. I checked and it was full BUT it was green (instead of orange, the required color coolant for my model). I will take it and get it flushed (83,000 miles right now).