How many reverse lights on a 2008 terios. - 2008 Daihatsu Terios 1.5

I suggest that you can send Terios to a professional auto repair shop for repair; if the repair cost is too high, you can consider replacing it with a brand new one, such as a new one in 2020.

The yellow spanner light indicates a service is due

Scan the vehicle and find the code. The code will indicate the problem.

I am taking a bit of a guess because I don't have information on such a late vehicle but I think it is a fair bet Diahatsu are using embedded transponder chips in the keys with a steering lock/ignition switch mounted receiver.

That was a popular trend among manufacturers and was the system employed by Diahatsu in their earlier models with a master key and up to three slave keys. They are more likely I think to leave the basic system as it is and just add a remote locking system than to develop an entiely new system at unnecessarily high cost.
They could have cribbed a system from another manufacturer of course...

The Ford PAT system was just about identical and gave little trouble and they bridged the gap by fitting remote locking and providing a remote.
The Renault system was similar but many models were very troublesome as they aged and the immobiliser was soon updated and was integrated with the key "plip"

Both these manufacturers use a dashboard mounted light to indicate whether the immobiliser had been successfully disengaged but I have no information about the Diahatsu other than a note dedicated diagnostic equipment is required for key coding.
I am sorry this hasn't been much help.

on youtube you find the reseting

If they are made to fit your vehicle then the enclosed instructions should guide you in replacement procedures.

This should be available from Daihatsu customer service on line , from a down load sit for manuals, from e-bay( auto manuals ) or from second hand book shops , from shops that specialise in auto manuals.

I've just stuck your details on the web and there is all sorts of info on manuals. If you dig through you may even find a free one. If not pay for a download?

Check the wires that go to the fuel sender (at the tank) one is corroded, or loose.. or worst case the fuel sender has died.
Very very rarely does the actual guage break...

wow someone knows their stuff ,if not sure where numbers are i ask in our local annual vehicle inspection station ,dont you have one??