I normally get around 420km per tank before the low fuel light comes on.

Last week, I drove in Sport mode for a whole tank load and got to only 370km before the fuel indicator came on.

I switched back to Economy and filled up.But the next tank load only got me 360km.The next tank load was even worse - 250km and the fuel indicator came on.

Today, at half a tank, I have only driven 130km!

What is going on?

The only symptom I can see is that the car now seems to have more acceleration from stop.

It would seem that it is stuck in Sport mode, but counting the gear changes shows that it is still starting from 2nd gear.

Help!!!