Fuel range

[Erik000]

Hi. I would like to ask ,how to fully reset fuel range on my car. I fully tanked and it's displaying 350 miles range. Fuel consumption is 55 mpg.

[Mooly]

You haven't said what engine size and whether petrol or diesel.

My 1.33L Auris defaults to (from memory) around 416 miles range showing and that then gets modified over many fill ups to more truly reflect the range. Mine typically settles around 436 or so even though the maximum range is far higher than that. 

Have a look here:

 

[Erik000]

Sorry about that.  2007 2.0 d4d 1ad ftv alu block alu head timing chain 

[koji]

Interesting. I have the same engine, but in a 2013 car.

My mean fuel consumption is 54 mpg. After fully tanking, it always insists in a 400 miles range, but I always reach 500...

I don't know how to reset it either...

[Mooly]

The only way I know to return it to default range is to reset the ECU which happens with a Battery disconnect for example. That will likely give a 'low' figure (it does on mine which is petrol though) but from that point on it adjusts as it sees what your actual mpg is although as mentioned earlier, in my case it never goes as high as it really should even though the statistical evidence over thousands of miles suggests it should.