Dear All, there is a sensor in CNG main kit which show gas usage indication inside your car mean green color dots light, if there is an error or level is not correctly displayed.
in CNG kit there is white color circled resistor type sensor only cost you from Rs. 80 to Rs. 150 and normally mechanics charge them to change this is Rs. 400.
there is no rocket science in it, so next time when you change just keep an eye on this thing.
aamir
