A quick way to precisely diagnose myriad automotive problems—or at the very least get a rough idea of what might be wrong—is to use an automotive scan tool.

One of the most common reasons your check engine light comes on is a faulty oxygen sensor. Here's how to detect problems with the sensors and how to fix them.

In this tech article we explain the sometimes daunting task of diagnosing problems in your EFI system-equipped late-model musclecar including how to read computer trouble codes with a diagnostic ...

In this article, we’ll talk about oxygen sensors. We will explain what they are, give all symptoms of a faulty sensor and explain when you should replace it.

Your vehicle's computer contains a wealth of information that it gathers from sensor on almost every system. It used to be that only shops had access to that information, but that's not ...

Oxygen sensors are not among the maintenance items that need to be replaced regularly, so they typically are replaced only when they fail.

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.