Fuel consuption error on the instrument panel
 

Hi,

A8 4.2TDI. The instrument panel says consumption is 6,7L/100Km but real consumption (filling up and checking millage against liters) is 8,3L/100Km. That´s a 1,6L consumption difference between what audi says on the dashboard and the real one. I was aware that manufactures lie a bit on the measurements so we live happy, but 1,6L is a massive difference.

Has anyone found the same problem?

I´ve only seen this happening after engine ECU remapping.

I know that BMW has some short of hidden menu to modify "special" functions within with there is something like a fuel consumption correction factor that you can change in order to adjust it so it matches the real figure.

Any suggestions?

Cheers!

yes there is a way to change to it to calculate asyou need it to, i cant remember if it vagcom or the hidden menu, will take a look tomorow and let you know

Cheers!

I don´t even know how to access the hiden menu on this audi.

It´s nice to see a low consumption on the dashboard, but in this case is a complete lie...

It can be changed on many models with VCDS in instrument adaption. You can adjust it 85-115%.

you need vcsd to change the consumption, this is how, you also need it to enable the hidden menu

Correct Consumption in DIS program

[17 - Instruments] [Adaptation - 10] -> Channel 3 change 100 to xxx (see samples below)

Sample 1 - Calculation based on volume per distance (e.g. l/100km):
DIS: 9.3 l/100 km.
Real: 9.8 l/100 km. (100 * 9.8 / 9.3 = 105.38)
Channel 3 will be changed from 100 to 105

Sample 2 - Calculation based on distance per volume (e.g. MPG):
DIS: 23 MPG.
Real: 24 MPG. (100 * 23 / 24 = 95.83)
Channel 3 will be changed from 100 to 96

you can test if somene has already enabled the hidden menu

Press CAR + SETUP for 6 seconds to enter the hidden menu

but be carefull some of it is dangerous, you can turn your car in to a brick, suggest you google it and see what can be done, and not