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Try unplugging all 4 of your o2 sensors, spray them with oil and plug back in. Disconnect your battery for a couple of minutes. This may help. It worked for me before.
 

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Yes I understand what the code means, but I did however unplug my o2 sensors, ( all 4 ) and sprayed the connections with Rustcheck. Any spray oil will work. I then plugged them back in and code never came back. Maybe it was just because I unplugged my battery....

They will throw codes if moisture gets inside the connectors.
 
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