TC light on and AWD malfunction alert

2005 FORD FREESTYLE
90,000 MILES • 3.0L • V6 • AWD • AUTOMATIC
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NIMAJAFROUDI
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  • 1 POST
My tc light is always on and I have AWD malfunction. I took the car to the dealer they said it is the pressure switch(p1889). I wish to know if there may be other causes and?
And I want to know what this switch does and what happens if I don't replace it
Sep 10, 2014 at 1:45 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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