Faulty Trip Computer on Focus? - purpleparrot

I have had my 02 plate 1.8 tdci ghia for 3 weeks now and absolutely love it. But I have noticed one problem.

The average mpg on the trip computer keeps going crazy!

My 25 mile journey to work is normally not very stop start and most of the time the readout registers about 49mpg which is great. But when it goes wrong the reading can drop to about 20mpg and I have not changed my speed from about 50mph for miles!

Then sometimes the meter will do the opposite and suddenly go to 99.99 mpg! wow!

So I do not trust the meter whatsover.

Is there something that can be done or do I just have to ignore it?
I have tried resetting it but this makes no difference.

Ask Honest John

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