Hi Bley
The light you refer to is the gas bottle light.
It can refer to the bottle carrier being open if you have a swing out carrier, or a gas low indicator if one is fitted.
If you have neither,
Behind the left hand engine cover near where the bonnet ram attachés to the chassis, there is a cluster of wires, check nobody has mistakenly joined the lpg warn wires together.
Hopes this helps.
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