Can I calculate wheel alignment from OBD parameters. Car is Hyundai i10, and it doesn't give any Steering Alignment/ Steering Position data. The only method to check the alignment is to let the car move as you keep your hands off the steering wheel and watch it drift to one side. But, can this be detected while driving from an OBD?
When you say OBD i'm assuming you mean generic data. The answer is outright NO. OBD generic data has no parameters that the alignment can be gleamed from.
If the car has a steering wheel angle sensor then maybe you could tell if something is wrong. This data would be available in manufacturer specific. If the angle has been off for a long time at high speed then the alignment may be off. But that is really it. You can't tell if it's the caster, camber or toe that is out and by how much.
To my knowledge, the OBD-II standard does not require manufacturers to provide this information.
That said, some manufacturers may make steering angle information accessible through make-specific cables. This is usually done to give dealerships the ability to calibrate or recognize a replacement sensor.
Even if this information was available, you would need a means to evaluate the angle and orientation of each wheel. Most wheel alignment shops use special tools for this job.