Here is a proof-of-concept video of fuzzing an instrument cluster from a Mazda 2 wherein I used nano-can which is a 5$ dollar CAN / Car Hacking tool on a cheap.

https://www.youtube.com/watch?v=Ea0hRqTxxo8

Arduino sketch:
https://github.com/ROOTCONLabs/carhacking/blob/master/sketches/mazda2_rpm_fuzzer.ino