Quote:
Originally Posted by Old Tele man
...I ask because both of our Toyota-made, defunct-GM Pontiac, Vibes' ('04 & '09), show a consistent "+2 mph" high reading on the speedometer, but NOT when read through the OBD-II connection via ScanGauge-II from the ECU.
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Same here.
Dash reads 2-3 kph fast, but ScanGauge value matches GPS-speed