Boot sorted, but engine light...!

The boot was easy to sort. All I had to do was remove the panel inside the boot (T20 Torx screwdriver) and pull the rod that works the catch. I'm thinking that I've solved it now after a bunch of wiggling and repositioning the rod and springs. All seems good so far (touch wood!).

However, I've had a couple of occasions when the engine management light has come on. This look a bit like this:

It comes on when the car is low on fuel.
It doesn't seem to actually indicate a fault though. Hmm.