Why it matters: O2 sensors feed critical data to your ECU, helping maintain the ideal air-fuel ratio for performance, efficiency, and emissions control. Reading the signals: Healthy upstream sensors ...

Some Pixel Watch owners say SpO2 and skin temperature tracking disappeared after a recent Fitbit update, and Google is ...

Stricter smog checks: From October 2025, California will require all OBD-II readiness monitors to be set for a vehicle to pass inspection, with phased exceptions. DIY tools expand: Affordable scanners ...