Mercedes-Benz NOx Sensor Teach In with YOUCANIC Scanner

About this video

In this video we show how to perform a NOx sensor teach-in / adaptation on a Mercedes-Benz using the YOUCANIC UCAN-II scanner. You’ll see exactly where to find the function, how to run it after replacing a NOx sensor, and what to verify in live data.

Want the full guide with photos, tools, and step-by-step help for this scanner demo?

👉 https://www.youcanic.com/nox-sensor-teach-in-youcanic-scanner-diy/

At YOUCANIC, we’re on a mission to make car repair knowledge accessible to everyone so you can fix your own car, save money, and understand what’s really going on under the hood.

Note: Teach-in does not repair bad sensors, wiring, DEF quality issues, or a failing SCR catalyst. Always fix root causes first.

What you’ll learn

Connecting the YOUCANIC scanner & vehicle selection

Navigating to NOx sensor teach-in/adaptation

Live data checks before/after adaptation (NOx ppm, temps, lambda)

Clearing codes and confirming monitor readiness

When a teach-in may help (after proper repairs):

Check Engine Light with NOx/SCR codes

AdBlue/DEF warnings or countdown messages (“Start not possible in XXX miles”)

Reduced power / limp mode due to emissions derate

SCR efficiency or NOx plausibility faults that return after parts replacement

Common DTCs (examples): P2202, P229F, P20EE, P2BA9, P2BAA (varies by model/year)

Applies to: Many Mercedes-Benz diesel models with SCR/DEF systems (Bluetec E-Class W212, S-Class W222, GL/ML/GLE/GLS X166, Sprinter, etc.). Menu names can vary. OM642 Diesel 3.0 2.1 2.2 L