Fuel figures suddenly drop

[Tony673]

Hi all,

Up until about two weeks ago I was consistantly getting 49 mpg, but one day the insrument display suddenly flipped over to zero miles on the trip counter and temperature changed to F instead of C. From that point I am now getting 44 mpg. My driving habbits have not changed and the car doesn't seem to be running any different so I'm wondering if I might have an ecu glitch and if it's worthwhile resetting it.

Any suggestions or advice.

Tony

[Tizer]

If the temperature changed from C to F then maybe everything has reverted to American units. A US Gallon is smaller than a UK one.

I have no idea how you can reset it other than possibly with FORScan and an Extended Licence. 

[Milkman]

Two possibilities, the car has either pre-prepared itself for when we leave the EU or it has been nobbled by Trump. 😕

Seriously though, Tizer could well be correct. Has there been any interruption of power to the ECU?

[TomsFocus]

Did you accidentally press the reset button to the left of the rev counter maybe?  That should switch between C & F.

[Tony673]

I have decided to reset the ecu (diss battery and short leads) and now all seems fine with 49 mpg after a 20 mile run around town, so I can only assume that the ecu had a momentary power dip. I will keep a close watch for any future glitches though.

Thanks for the input.

Tony