09 Legacy Rich Exhaust Lean

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lab2370

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Mar 12, 2021
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Have an 09 Legacy running rough, smells pretty strong, feels like its occasionally missing. Throwing codes

P0139: 02 Sensor CircuitSlow
P0171: System Too Lean Bank1
P1153

I have changed 02 sensors (both) Some very bad spark plugs, Wires, and coil and Nada.... Any ideas?
 

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