It is easy to find out the problem as to why your petrol gauge of your Vauxhall Frontera isn't working but difficult to repair on your own. But you could try out a couple of things at home to figure out the problem. Usually the reason to why the gauge doesn't work is due to a fault in the current flow that is sent to the gauges for their operation. That is, there is a power interruption somewhere in between. You could check your fuse box for a blown fuse or check for loose or detached wires going to and from the instrument panel.
Another way to fix it is test each sensor and see if they are sending the proper signal to the gauge. Then individually supply power to the gauge and check if it is sending the appropriate signal. You will then be able to determine if the problem is in the sensor, the gauge or the power delivery. Best thing to do in this situation for you is to contact a professional in your neighbourhood.
Another way to fix it is test each sensor and see if they are sending the proper signal to the gauge. Then individually supply power to the gauge and check if it is sending the appropriate signal. You will then be able to determine if the problem is in the sensor, the gauge or the power delivery. Best thing to do in this situation for you is to contact a professional in your neighbourhood.