As below picture show, two behaviors are abnormal.
The fuel is up as the odemeter increased, opposite change.
fuel error and fluctuation very frequently
If you check the power supply for the GPS tracker, it is normal.
But what's the reason behind? The answer is hidden in the below pictures.
The welded metal kept griding against the fuel sensor wires leading to red wire been cut and touched with this metal box.
The power supply to the fuel sensor becomes unstable then the fuel sensor output data is disordered.
After wire repairing, the fuel level graph is back to normal
