may be following causes;
1, using cng and needle is down either tank is half.
2, malfunction of fuel sensor.
adviced, in 1 & 2 cases fill some litres not less than 10 ltr and check if problem presist check through honda service centre.
3, fuse is switched off in fuse box. (check fuse).
4, when u tuned it (if more than 3 months) grt tuned it at honda service centre and told them to check on computer may be some software problem (but dont tell actual problem they will charge you extra).
more your luck.....