Micra speedometer shows faster than it's really going
I did a test today, I compared my Micra's speedometer with that of my GPS. I was surprised to find it off by 5 KPH.
http://mymicra.com/P6100058.JPG
It seems to be less off at lower speeds, and more off at higher speeds.
After that, I decided to reset my trip counter in both the Micra and my GPS at the same time. After the Micra showed 80.4km of travel, the GPS showed 78.06km of travel.
Has anyone else noticed this?
speed in car's OBD-II computer vs. speedometer
Confirmed in the SR automatic I'm driving that the speedometer is consistently reading 4 km/h higher than the car's computer, which looks to me like a correction factor. I used an OBD-II scan tool (ScanGauge-e) and checked from 30-100 km/h:
Speedometer reports...
|
OBD-II value... |
30 |
26 |
40 |
36 |
50 |
46 |
60 |
56 |
70 |
66 |
80 |
76 |
90 |
86 |
100 |
96 |
I didn't check against the odometer, but will do that too. I bet the dash display matches the OBD-II values.