Question about 2000 Ford Expedition
DTC results are
P0171 system to lean bank 1
P0174 system to lean bank 2
Generally when these codes appear it is due to insufficient fuel pressure. Test your fuel pump to ensure it is within specs. Have you changed your fuel filter?
Posted on Jan 15, 2009
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Posted on Jan 02, 2017
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System Too Lean (Bank 2)
Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.
Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
Dec 17, 2009 | 2002 Ford Windstar Cargo
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