You have a 2019 GT-R with only 16K miles, you may not have the new car warranty now but you do have powertrain warranty to cover you. The latest P0500 Vehicle Speed Sensor Malfunction is related to engine problem. If I were you I’d take the CX-5 to your Mazda dealer and let them diagnose the problem. $199 diagnose fee will be waived if you have any engine problem on the 2.5T. With all the 9 different error codes, I believe a Mazda dealer has the best chance to figure out the problem, although it can be expensive. But then you also have a chance to get covered if your problem is powertrain related. Even if it isn’t powertrain or emission device related which will be covered under warranty, you still can contact Mazda North American Operations trying to get some help on expenses as you have such a low miles on your CX-5.