Posting this in case anyone ever looks through the archives of /hg/ as I did for a fix for gd3 honda fit eps or torque sensor issues.
If you have the issue where torque sensor relearns fail, or where your car turns itself all the way to one side, it’s due to a missing or corroded ground clip on your steering rack. You can check if this is your problem by reading the data on your hand scanner and seeing if even while the car is off, you get a constant negative reading from your torque sensor.
I first had this problem, then replaced my rack with a used rack. The problem persisted so i got a remanufactured unit.
There is a green wire attached to the rack and pinion which is clipped to your Fit (sometimes to the subframe) using a metal fastener. This actually acts as a ground. Without it, your torque sensor may not work properly, instead having the constant reading.
You may not need to replace your whole torque sensor if the traditional means for resetting the steering do not work. Check if you’ve lost this ground, and you may be able to jerry-rig a ground that will work, restoring your values and fixing your EPS.
Also of note is that in my case, there WAS NO EPS warning lamp.