Last month, we kicked this series off by showing you how to save some money by diagnosing a bad MAP sensor rather than just chucking cash at new parts that may or may not fix a specific problem. This ...

While O2 sensors have no fixed replacement schedule, your driving style and the health of other engine components can ...

Although I should say, replacing an O2 is about as easy as it gets-- you literally unplug it from the harness, unscrew the old one, screw in the new one, replug, done. Now, you do need an O2-sensor ...

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I've recently bought a pick-up (2000 Nissan Frontier 2wd 4 cyl). It has about 118k on the odometer, mostly highway miles. Engine runs good, transmission shifts well, etc. However, the gas mileage is ...