Had the same thing come on (3) times in a 2019 Jaguar Fpace Diesel. The sad of it, Jaguar claims they fixed it, that is was "a bolt" and within miles its on again- of course NOT under warranty this time and they want $8K to replace the def system. According to a Jaguar dealership, Jaguar requires total replacement of the def system instead of fixing. Of course they do....it is out of warranty!! I would NEVER trust Jaguar again. Regret that a 5 year old car with 80K miles on it is basically headed to the junk yard. Supposedly the super charger is "screaming" ad was told that only "a trained ear" could hear it. I call BS... Obviously, Jaguar is not competent to even service their own vehicles.
Action Plan.pdf