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Fault code P0171 Fault code P0171
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Old 05-07-2012, 09:12 PM
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A code p0171 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor.

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Last edited by dodoni1; 05-07-2012 at 09:19 PM.
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