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Originally Posted by Frodo
A related question, out of curiosity. Was it just one O2 sensor you got the code for, or more than one? How many did you replace---just the one(s) throwing the code(s) or all of them? I ask, because I'm currently in a similar situation.
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Its always better to replace them all as a set, because they get contaminated with exhaust stream during usage, and over time, they degrade in performance.
Replacing just one or two might clear the CEL, but the chances of it coming back on soon are much higher, when the computer realizes that the unchanged ones are slower to respond than the new ones.
Think of it this way:
If the Original 4 O2 sensors lasted 12 years, and 100k miles, would you rather replace all 4 at the same time, and not need to change them again until the 200k mile mark, or would you rather have to keep inspecting the CEL every 25k miles, until all 4 are replaced at 200k miles, when you might then have to replace the first one again, etc...
BC.