Second error:
"Unacceptable information about vehicle speed through V-CAN, compared to the speed of the show measured by wheel speed sensors - not exactly."
as well as problems with the gearbox (no possibility of changing gears and briefly displaying the N symbol) are the result of an error from the ABS sensor.
The system compares the speed of the front wheels with the speed of the wheels from the tacho sensor and via V-CAN2 compares them to each other whether they are compatible.
The problem with the signal of one of the ABS sensors automatically generates such incompatibility hence the error:
"Unacceptable information about vehicle speed through V-CAN, compared to the speed of the show measured by wheel speed sensors - not exactly." And I doubt that a magnet is the cause here. In the digital tachograph, unlike the old analogue tachograph type, the magnet does not unless it will cause a permanent error in the Tachograph from the very beginning of the magnet.
In addition, the AsTronic system uses a speed signal from the front wheels (or, to be more precise, from the steering axle) to determine if the car is not in the bend (because the inner wheel spins slower from the outside), because after detecting that the car is "on the bend" "Astronic will not change gears to higher (because it may cause the car to become unstable). Lack of reliable signal from the ABS sensors of the steering axle is then noticed by the AsTronic system which just ignites the warning on the board.
The problem you most likely have in the installation (water or moisture inside the t-shirts + broken wiring of the sensor leads to a short circuit to ground - water is a good conductor of electricity). Check the sensor circuit for insulation to ground. Settle the sensor as the second one.
Alternatively, the sensor face has rubbed off the rusty hub ring and the water has entered the sensor shell through the sawn face and causes it to short.
Start by checking the beam
