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What doe's code P0171 mean - 2001 Ford Taurus

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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:---

  • The MAF (Mass Air Flow) Sensor is dirty or faulty.
  • There could be a vacuum leak downstream of the MAF sensor.
  • ---------
  • In the vast majority of cases, simply cleaning the MAF sensor does the trick.
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter and proper fuel pressure.
  • ---------
  • The MAF is located in the air intake duct work, to the left of the air filter. Look for 2 wires leading to the sensor unit from the outside to pinpoint it's exact location in the housing/duct.
This will help.Thanks.Helpmech

Posted on Nov 13, 2010

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Technical Description

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What does that mean?

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Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

-----------

Thanks.


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