Uploaded February 2021 | Updated September 2026, 23 minutes ago

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For some reason, the incident at the end of the video caused the O2 sensor to draw too much current and the multimeter fuse to blow.

I think the readings for lawnmower exhaust were lean due to an air leak in my exhaust set up.

Figuring out the inner workings of this particular O2 sensor:
youtu.be/wx_dsIxfgNU