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1999 ford f150 engine code w-- year code x

(1999 Ford F-150)
in Port Huron, MI on November 18, 2009
Vehicle has 2 codes- p0304-miss fire cyl. 4, also p0133-oxygen sensor circuit. what does bank 1 sensor 1 mean? and also is the misfire on this same bank? How can one cure these problems and what should we be looking for? Thanks
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Popular Answer
on November 18, 2009
Here is some detail on the P0304:

That should get you started. The two codes are likely related to the same root cause.
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