I swapped my H23 for an H22. I also swapped the gauge cluster for the H22. When I'm driving, the speedometer will start off about 10km/h too slow. It will gradually fall down more to about 20-30km/h too slow. If I go fast, about 140km/h, the speedometer will read about 40km/h too slow.

If I hold a steady speed on the highway, the needle will eventually go down while I'm holding the same speed. I know it's not reading correctly because I plug my laptop into the ECU and Hondata shows the correct speed.

Also the needle lags when I press the gas or brake. Would a simple recalibration fix this? I tried a few different needles since I had 2 H22 gauge clusters.

The RPM needle is fine. So I switched the needles around and the speedometer still doesn't work, so the needles must be fine.

 

replace the vehicle speed sensor.

 

It worked before I switched it. I drove for about a month after the swap with the old cluster. Right after I switched it, I turned the car on and it started doing that. I do have an extra sensor but I doubt it's that.