Q: In my vehicle, the check engine light comes on and then goes off and it is now back on. I had a test done at local auto-parts store that showed a code of PO138. They told me this indicates a ...

Whether it’s been a while since you’ve used the feature or never have – follow along for how to check blood oxygen with Apple Watch. We’ll also cover which models support the feature and how reliable ...

I had a test done at local auto-parts store that showed a code of PO138. They told me this indicates a problem with the oxygen sensor. I replaced the oxygen sensor and the light never went out. I ...