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2002 Sub 5.3 flex fuel showing two codes

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Old Today, 02:37 PM
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Question 2002 Sub 5.3 flex fuel showing two codes
My Sub is running great but the evil check engine light popped on, my scanner shows two PO133 codes.One is just PO133 but the second one has two tiny p'* after it one being upside down.
All input appreciated.
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Old Today, 03:23 PM
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https://charm.li/Chevy%20Truck/2002/...0Charts/P0133/
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Old Today, 05:57 PM
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I have all those codes came wit my scanner, both codes are Ox sensors but none says anything about the two small p'*
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