Recently I had a problem with the MAF sensor and another pressure sensor, furthermore some problem with the turbo it didn't retain the vaccum. Now that everything is fixed I get this problem.
Speedometer records the accurate speed of the vehicle then it drops to 0 when I'm pressing the gas pedal, after that when it reaches 0 it comes back to the real speed, to point the fact I wasn't slowing down or something the car was going at a steady speed like so: https://imgur.com/a/mBXcIKn
Car Details: Mazda 3 BK 2005 1.6 CD 109HP Diesel
Mileage: 270.030KM
Is it doing that all the time?
It starts after I'm driving the car not all the time like, if I drive it for 1 hour and then shut off the car then come back to it after 8 hours and start driving it does that, for the first drive of the day it doesn't do that, but after some kilometers it stop doing that I hope you understanded what I've just said
For my experience, that generally means that the dash unit itself starting to break down. I've seen that in many cars be just that a dash unit that's starting to break down. But realize the dash is ultimately run by computer modules which can also go bad. So have a mechanic check both
