Or, you can just replace your O2 sensor (s) at regular intervals, to try and prevent that minor drop in mpg sometimes caused by a "lazy" high-mileage sensor. Simple Replacement ...

When Should I Replace The O2 Sensor? The answer to this question is complex, as these sensors are not your standard maintenance items. No indicator lights on your dashboard or other means could hint ...

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

Replace both the upstream ones at the same time so the reading will be consistent. You can keep the downstream one on there. The only difference between the two is the length of the wire.<BR><BR ...

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.

The oxygen sensor on a cars exhaust is used to determine how efficiently the fuel mixture is to an engine. These can be a real pain to replace, so it can be helpful to fake the signal to the ECU.

Your vehicle's O2 sensor plays a significant role in its performance and if it's faulty, it's not something you should ignore. Here's what you need to know.

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.

Enter the oxygen sensor, also called the lambda sensor, because it gives an indication of the ratio of air to fuel (called the lambda ratio) being consumed by the engine.