Quote:
Originally Posted by ukpm
I think (could be wrong) but the Civic uses a speed sensor on the transmission. This is prone to reading inaccurately, and generally the higher the speed the greater the error. My own car seems to match the GPS speed exactly (so long as the GPS is behaving itself) but then I think it's using the four sensors on the wheels from the ESP system to get the speed.
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Why is your Civic different, why is taking speed readings from a different place to eveyone else's? How do you know?