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Q: got two codes on 2004 Ford F-150 Heritage

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
like to know where they are front or back /passenger side or driver side when you are sitting in it.the codes are po171 and po174 both are system too lean bank 1 and bank 2 which ones are they and where are they located.front back left or right when sitting inside
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