Your car's computer uses data from the O2 sensors to determine the effectiveness of the catalytic converter and how much fuel to inject. So they're critical pieces. Luckily, replacing one is ...

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 ...

What could be the reason for your car to fail a pollution test? While there may be many factors, one of the most common problems is that the vehicle hast run long enough to warm up the catalytic ...

That annoying "check engine" light more often than not probably means an oxygen sensor needs replacement, at least that's according to the CarMD.com Corp.'s second annual Vehicle Health Index of car ...

IRVINE, Calif., April 24, 2019 /PRNewswire/ -- CarMD, a leading provider of automotive diagnostic data and business solutions, today released its 2019 CarMD® Vehicle Health Index™ report. This annual ...

A few weeks ago, I visited a plant in Anderson, S.C., run by Robert Bosch Corporation, which builds oxygen sensors for automotive engine management systems. If you're thinking that a tour of a factory ...

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 ...