I started using the “MY Peugeot App” when I 1st got my car and for a month it was great, no need to go out to the car as I could look on my phone and check the fuel level/distance remaining etc, until one day I did a 2 mile journey and it went bonkers, said I had used 23 gallons of fuel (in litres) for the 2 miles and subsequently changed my average mpg from 48.9mpg to 0.2mpg and on nearly a full tank I had a range of 0.1 mile. ??
Stopped using it now.