Question about 2001 Ford Taurus
The error code P0171 means oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust).
This causes because as follows:---
Posted on Nov 13, 2010
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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.
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