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O2 Sensor, Code 27?


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I own a 92 SC300 and my check engine light is on. I am getting code 27 and as far as I could tell, that means Sub O2 sensor malfunction. My problem is ppl have told me there are 3 o2 sensors and others have told me that I only have 2 on the headers. I just want to find the right sensor and replace it. If you have any info email me at or just respond to this. Thanks

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