What is a "coded welder"?

Question

Somehow my question has ended up in the car area.

Answer 1

You are either posting in the wrong area or asking what a code reader is. A code reader is a little device you plug into your car when you have a check engine light on that gives you the error code to help diagnose what the problem is. You can buy them at any auto store for about $80-$120 for a good one.