Did anyone got this problem on this matter before:

Truck Still RX20-20 using hydraulic levers and we have a problem with sideshift lever:

the value at neutral position of sideshift lever in diagnostic software reading around 4.9V so the pump motor alway be activated. (the correct value is 3.9V)

I tried to change new hydraulic hall sensors (there're 4 sensor attached on the bar) but problem can not solved

So I changed the whole hydraulic valves (valve and sensor) but problem still remain.

I check the wiring from the sensor to MCU but it's ok

I do not know where the problem come from?

Anyone know, help me.