So I've recently purchased this:
And it is working absolutely amazing in my car like that:
Now the only problem is this, when I'm traveling at a speed of 147 kph (that is showing on my speedometer) the OBDll connector displays 135 kph. This is pretty confusing as both speeds are given from the car itself, the 147 is taken from the dash itself and the 135 is being read from the ECU. Now I want to know why am I having this difference in speed reading, and what is the reason behind that?
And it is working absolutely amazing in my car like that:
Now the only problem is this, when I'm traveling at a speed of 147 kph (that is showing on my speedometer) the OBDll connector displays 135 kph. This is pretty confusing as both speeds are given from the car itself, the 147 is taken from the dash itself and the 135 is being read from the ECU. Now I want to know why am I having this difference in speed reading, and what is the reason behind that?
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