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2004 3.8 liter check engine light P0135 code

6K views 0 replies 1 participant last post by  pgjcmartin 
#1 ·
I have a check engine light and the code reader shows P0135 for bank 1 sensor 1 oxygen sensor. My Haynes manual shows where the downstream sensor is but not the upstream. Can anyone help in where the bank 1 sensor 1 upstream sensor is? Thanks.
 
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