How to correct your fuel consumption readout:
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If your car is anything like mine, the fuel consumption readout will be way out. But it can be adjusted! First, you need to measure your fuel consumption as accurately as possible, by filling up the tank, driving until nearly empty, filling again, and figuring out your fuel consumption, in either litres / 100 kms, or MPG. At this point, also note what the fuel consumption as reported by the OBC is. You need both figures to make the adjustment. Once you have that accurate figure, follow the following procedure:
Unlock the OBC as described above.
Go to test 20.
This is the existing fuel consumption constant used in the calculation.
Find the ratio between the old consumption reading, and the actual consumption reading:
For litres per 100kms, this is the actual consumption divided by the reported consumption.
For MPG, it is the opposite. Ie. It is the reported conumption divided by the actual consumption.
Now multiply that ratio with the existing fuel consumption constant, the result is the new constant.
Simply type in the new constant, and press S/R NOTE: Some claim that for some reason, if you don't drive your car for a day or two, the constant will reset back to 1000.
