Just had an issue with my brand new (600 miles) diesel CX 5. Had the following warning accompanied with lots of warning gongs and flashing lights: 'Improper Adblue, spped will be limited in 25 miles, no start in 429 miles. Excessive emissions. Use proper Adblue.' When I interrogated the Adblue menu, it said 100% contents, but range showed '- - - - - mi'.
Took it to local dealers, but after 10 miles or so the fault message cleared. Dealer service very good, booked next week to have an investigation, looked at technical bulletins and it looks like a known issue with a software fix available.
Hopefully that will fix it, anyone else had the issue? By the way, if it had gone to limited speed, exactly what speed is that?