Hi,
The code you have indicates a problem with the input speed sensor. To access this sensor, you will need to remove the battery and battery box, and then the sensor will be on the side of the transmission.
If you look at the pics below, I included directions for replacing this sensor. Note: Honda has a specific way they want the battery disconnected and then reconnected. I attached those directions as well.
Let me know if this helps or if you have other questions.
Take care,
Joe
See pics below.
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Tuesday, July 27th, 2021 AT 8:24 PM