spendfuel not correct

Hi,
I'm using FMB140 with CAN connection to read the fuel level .But the output value is not precise like it sent 40 L,36L then it return to 40 L.
Does traccar has a filter for this so the spentfuel be more precise ?

No.

i have the same problem on my car. You should read the value of the fuel used (directly from the FMB) and through the calculated attributes you create a dummy tank and subtract the liters actually used

Hi,
I guess this does not fix the problem