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Discussion Starter #1
Does anyone have experience or detailed instructions on replacing the bank 1 upstream O2 sensor on the 3.9?

Thanks
 

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Engine Light and O2 sensors

I thought it too was OS2 sensors if the engine light comes on regularly,
found my problem to be Clean the Master Air Flow with cleaner, MAF is easily removed from the air intake after the air filter housing, did this and my issues cleared completely.
 
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