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Re: 96 Ford F-150 4.9L Cat Effiecency Code
Posted to Technical Discussion Forum on 11/20/2006

Hi George,

[...trimmed text...]

I don't remember what my scanner read when I did this post.

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This was back in the day when a bad O2 sensor would cause a CAT code. I had a '97 Ranger that would flag a ba... Login to read more.