Typically, a modern car has around 70 sensors, and driver-assistance software has seen that number further increase. One very important sensor in a car is a knock sensor, and if you're wondering ...

Replacing the oxygen sensor is the most common fix for the P015B fault code. Before doing this, inspect the sensor's wiring for any frays, nicks, tears, or corrosion.

I replaced the oxygen sensor and the light never went out. I contacted the mechanic that services my vehicle when I can’t, and he said codes don’t always indicate what is wrong.

Planar sensor technology has more than a toe-hold in the new car market; in the six years since its introduction, Planar sensors account for 53 percent of the O2 sensors in new cars.

Updated: Feb 11, 2025 / 12:03 PM EST Viewer-submitted questions for The Car Doctor: Q: During the state inspection of my 2019 Nissan Rogue, the “EVAP” and oxygen sensor came back as not ready.

The oxygen sensor was replaced but the 'check engine' light won't go out. Now what? Which octane fuel is best? AAA's Car Doctor has answers.