Speedometer slow Issue

[Fluxtasy]

Originally Posted by kevinj93

The response from Toyota will be "this meets Australian Design Rules".

ADRs allow the speedo to read 3 percent plus 4 km/h higher than the actual speed but must not read lower. This is tested at several specified speeds.

I have the same error in my Yaris. Interestingly, the data from the OBDii port agrees with GPS speed readings.

I have asked a few time on the forum before, but no one seems to have determined if the speedometer has any internal calibration adjustments.

Yeah the GPS speed readings on my phone & OBD2 port are the same too with around 1 sec lag from phone. Previously someone explained to me that the issue is that our speedometer is analogue and it does not display the info accurately.