What is your question?
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What is your question?
Check engine light comes on and was diagnosed by my mechanic as coming from the O2 sensor. Would like to DIY if possible.
1 Reply
There would be 2 oxygen sensors before the catalytic converters and 2 after them. Diagnostic testing is essential in monitoring oxygen sensor specific performance on a data stream via a diagnostic tool to see if one is not responsive compared to the others. Trouble codes that can seem to relate to oxygen sensor failure could actually be set off by many other things.