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PO174 Code Ford - What’s Causing the System Too Lean Condition?
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My 2013 Ford Fusion is showing the P0174 code (System Too Lean, Bank 2). I’m not noticing any major performance issues, but the car has been running a little rough, especially at idle. Any idea what could be causing this? Vacuum leak? O2 sensor? Looking for advice on where to start diagnosing.
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