[Update 19th October 2017 - this issue now appears to be solved in all diesel cars]

We made a change in the algorithm for Diesel cars (in Oct 2016). 

In some cars this resulted into Ray being RED most of the time.  We've now fixed this bug in recent version of the firmware.

Please let us know if you are affected by this issue by emailing support@gofar.co so we can help you