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 ...

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 ...

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 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.

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.

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.