Calculation error on trip/MPG counter
on my 2003 156 I have the on board computer in the centre that is, shall we say - a bit Alfa.
I thought that the MPG figures given where wrong, so on a fill up I reset both the computer counters and the trip on the seepdo/odometer.
My thoughts were confirmed the speedo counter was accurate enough on a know journey, but for every mile it did he computer thought I was doing 0.6 of a mile. So it appears that it is taking the info from the odometer and correcting it from KMS to Miles, when it actually doesn't need to.
Is this a simple fix, re-program or am I looking a silly money for parts.
It is not a big issue and I can do the sums easy enough to get true MPG etc.