We tested popular wideband O₂ controllers against lab-grade equipment to see how accurate their lambda readings really are under real engine conditions.

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 ...

We may receive a commission on purchases made from links. Modern cars are designed to be more efficient and eco-friendly than ever. Automakers build vehicles with a wealth of advanced features to not ...

Land Rover says some of its 2010-12 LR2 models may illuminate the Check Engine light and log O2 sensor trouble codes P2097 and P2099 in computer memory. If there are no drivability symptoms associated ...

As the name suggests, oxygen sensors in a car’s exhaust system sniff for oxygen, the presence of which indicates incomplete combustion and unchecked pollution. This can trigger the check engine light.