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Ford-Rangers.com Ranger Forum > Ranger Engine Tech > 6 Cylinder Gasoline > P0171

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P0171 #: 2604

Moderated by: Mike69, MaDMaXX,

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Posted: Fri Jan 13th, 2023 02:36 am

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eegle1
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2004 Ranger FX4 4.0L V6

I get the P0171 code only if the outside temperature is above 40°F. Having eliminated a lot of things, could this be the Air Charge Temperature Sensor?

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"", JAMMAN

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Posted: Fri Jan 13th, 2023 07:58 am

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DILLARD000
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Possible VacLeak in the
PCV hoses or IntakeManifold gasket?

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DILLARD000 has a 2001 SportTracJob2, V6~4.0L~SOHC Engin, 5r55e Trans, 1354 4WDTC, LS4.10+OS4.10 Diffs
Details & maintenance links at http://2001fordexplorersporttrac.fandom.com

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