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ranger: eng light..light code..1 replaced ox sens still get ck light…

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03 ranger 4.0...
03 ranger 4.0 ck eng light code 171bank 1 replaced ox sens still get ck light?
Submitted: 8 years ago.Category: Ford
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Answered in 4 minutes by:
6/17/2010
Ford Mechanic: connor75, ASE Certified Technician replied 8 years ago
connor75
connor75, ASE Certified Technician
Category: Ford
Satisfied Customers: 360
Experience: Senior master technician, Ase master L1
Verified
Good evening, the most likely cause of the code 171, is a vacuum leak, and the most likely cause of that is the port oring gaskets of the upper intake manifold, are familiar with these gaskets?
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Customer reply replied 8 years ago
port o ring gaskets where are they?
Ford Mechanic: connor75, ASE Certified Technician replied 8 years ago

Remove the upper intake manifold and the are what seals the upper intake to the lower intake.

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