Thread: P0171 System too Lean (Bank 1) what do replace
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Old 11-09-2004, 12:59 AM   #4
Partyzant
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Join Date: Nov 2004
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Re: P0171 System too Lean (Bank 1) what do replace
Have the same problem. P0171. Changeg oxygen sensors, spark plugs & wires, fuel filter. MAF is fine. Still that CE light comes back on. Fuel economy went down by 5MPG or so. Anyone got any ideas???
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