Uploaded November 2016 | Updated September 2026, 2 weeks ago

---

This is a companion video for my "O2 Sensor Basics" video, comparing a new and old oxygen sensor across the same test drive. The differences are subtle, but the aged sensor (~150,000 km) is slightly lazier and a little prone to biasing low (lean).

O2 sensor video: youtu.be/ekf-Xy9nEwY

Engine is a Ford Duratec HE in a Mondeo Mk3.

OBD2 scan tool used ~
Review: youtu.be/KdvnPC204zU
Amazon US: amzn.to/2cgqSbU | UK: amzn.to/2cd2Jm0