Transmission Shift Solenoid D Inductive Signature Malfunction (Ford)
What does P1717 mean?
The P1717 code means the vehicle's onboard diagnostic system has detected: Transmission Shift Solenoid D Inductive Signature Malfunction (Ford). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- No 4-5 upshift on 5 or 6 speed transmissions
- Harsh or erratic downshifts
- Transmission slipping in higher gears
- Reduced fuel economy at highway speeds
Probable Causes (Ranked by Likelihood)
- Failed shift solenoid D Very High
- Contaminated transmission fluid High
- Internal wiring harness damage Moderate
- PCM solenoid D driver failure Low
Step-by-Step Diagnostic Procedure
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Monitor solenoid D on a scan tool during higher gear shifts.
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Measure solenoid D resistance at the transmission connector.
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Command solenoid D on and off with a scan tool to verify mechanical response.
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Drop the transmission pan and inspect for excessive debris or metal shavings.
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If debris is present, inspect the clutch packs for wear before replacing the solenoid.
Frequently Asked Questions
Does my transmission have a solenoid D?
Solenoid D is found on Ford 5-speed and 6-speed automatic transmissions (5R55S, 5R55W, 6R80). Older 4-speed transmissions may not have this solenoid.
How often should I change transmission fluid?
Ford recommends every 30,000-60,000 miles for most vehicles. Regular fluid changes help prevent solenoid contamination and extend transmission life.
Can I just replace one solenoid?
While possible on some transmissions, replacing the entire solenoid pack is recommended because other solenoids may be nearing failure as well.