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When to replace o2 sensors

Failing o2 sensors may not necessarily trip a DTC. They start failing by not responding quick enough. You can only see this on a scan tool, preferably one capable of

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Old 09-09-2016, 07:19 AM   #10 (permalink)
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Failing o2 sensors may not necessarily trip a DTC. They start failing by not responding quick enough. You can only see this on a scan tool, preferably one capable of graphing the results. If o2 output looks more square wave than saw tooth, there is a problem.
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