It's a 2011 nissan tiida/latio hr15 engine the usa version is the versaI did some digging in my service manual and couldn't find a power steering pressure switch. I found a torque sensor for the steering but not a pressure switch.
It appears Nissan uses different codes for different models, the P1650 could be referring to a starter motor relay or Fuel temperature sensor.
What is the year & model of your Versa??
You may have to call Nissan and get exact verification of what that code is referring to you on your specific year/model.