Freestar V6-4.2L VIN 2 (2004)
P0170 - P0174: Testing and Inspection
P0171
OBD II - Base Gasoline
For diagnosis of code P0171 refer to chart
P0148-P0191
If there is no link in the chart then:
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This code is not a valid code for this vehicle
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Or information published by the manufacturer for this vehicle did not include this code