I have a 2011 PCX 150 it has only 3000 km and has been perfect until now. The digital fuel gauge always shows full no matter what level the fuel is in the tank. Has anyone on TV experienced this? I tried Google but no luck finding an answer.

Probably has one of these fuel pump/fuel level gadgets in the tank.  (Pic is a 2013 unit.) Perhaps the "sensor" (thing with red & black wires where the toilet tank float pivots) is kaput.  I'm guessing it is just a rheostat, so resistance could be measured.  Or perhaps the wiring plug to the whole unit could be unplugged to see if the meter moves. 50/50 chance it'll drop to empty, though the sensor could be open or shorted.  Or have a mechanic pop out the pump and wiggle the float. 

 

 

Here's some basic how-to, though for a different unit:

 

 

Would shaking the tank back and forth maybe work? 

Float problems?

Maybe Thailand invented the world's first perpetual motion machine?

 

 

Should be cheap to run if it's always full.

22 hours ago, impulse said:

Maybe Thailand invented the world's first perpetual motion machine?

 

 

Same same as Ebola cure? 

1 hour ago, lvr181 said:

Same same as Ebola cure? 

 

You're on the right track there...

Run the fuel low by using odometer. (You should already know how many km you can do on a full tank) 

 

Then using a torch/flashlight have a look into the tank. If you can see the float poke it with a stick. 

 

Failing that your only recourse is to take it to a workshop.