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Yellow Markings on #1 Oxygen Sensor?

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Old 06-21-2011, 10:31 PM
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Yellow Markings on #1 Oxygen Sensor?

I am having an issue with my bank #1 Oxy sensor that is flat lining. I noticed I can see a yellow stripe on the side of it. Any idea why this marking is there? Is that normal? Hoping someone that has done theirs may recall if they had any markings on them. Thanks!

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