Re: Oxygen Sensor Replacement


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Posted by 92sub (198.208.251.23) on 12:42:52 05/13/08

In Reply to: Oxygen Sensor Replacement posted by NoEcm

I m sure others may disagree but I m a firm believer in if it ain t broke, don t fix it .
For a modern vehicle (pretty much 1996 or newer) the oxygen sensors are monitored by the computer in many different ways. A sensor that is no longer capable of performing within its design window WILL be identified and you ll get a check engine light. Now this isn t to say an new O2 sensor won t perform slightly better than one with 100K miles, but the difference in fuel economy wouldn t equal the cost of the sensor (even at $4 a gallon). If you do decide to replace your sensors, ONLY use the OEM replacement. And, you would only have to replace the sensors that are between the catalytic converters and the engine. The sensor after the converter is used mostly for converter diagnosis and has very little (if any) influence on fuel trim.



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