Selecting petrol/methane fuel mode
Methane operation is the normal engine mode; petrol is used only when starting the vehicle. Button A, fig.
39 allows the user to select either petrol mode or methane mode.

The actual switch to the selected fuel mode depends on the vehicle operating conditions, so it may not be immediate.
The switchover is indicated by the indicator lamp, which may or may not be lit,
in the instrument cluster.
When starting the engine at an outside temperature below approx. -10°C, the switchover from petrol to methane takes longer, to allow the reducer/regulator to warm up sufficiently.
When methane runs out, the system switches automatically to petrol (all digital display segments go out and the indicator lamp
lights up in the instrument cluster). The engine
may continue to run on methane for several kilometres before switching to petrol.
Test yourself
A quick Fiat Punto quiz: every answer comes with an explanation and a link to the manual page.