Does the X-Trail have a throttle plate?
My plateless petrol Fiat is out by a 30% as well, and my TDi changes wildly over each tank from 8%-30% despite being driven in much the same way over much the same roads.
I wonder if changing the engine size parameter rather than cailbration yields more accurate results? On the 2.5TDi I seem to get more accurate readings if I enter 2.0 as the engine capacity and then only add a 1-2% of calibration. Thoughts?
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