P2717 indicates that the transmission control system has detected an intermittent electrical or hydraulic fault in pressure control solenoid 'D', which regulates transmission line pressure for specific clutch or band apply circuits. The intermittent nature means the signal or performance drops out occasionally rather than failing consistently, making it harder to isolate than a steady fault.
The solenoid coil or internal valve mechanism is degraded, causing intermittent operation under heat, vibration, or pressure load. This is the most common root cause for this code.
Corroded, loose, or chafed terminals in the transmission harness or pass-through connector cause intermittent open or short circuits that trigger the code.
Contaminated fluid can clog the solenoid bore or valve body passages, causing intermittent pressure regulation without a true electrical failure.
Worn valve body bores, sticking valves, or clutch seal leakage can create pressure fluctuations that the control module interprets as a solenoid intermittency.
A rare internal driver circuit failure in the control module could cause intermittent solenoid command issues, but this is uncommon and should only be considered after all mechanical and wiring causes are eliminated.
Short distances may be possible, but intermittent pressure control faults can cause unpredictable shifts or slipping that may damage the transmission over time. Diagnosis should not be delayed.
If the fluid is heavily contaminated it may contribute to the fault, but a flush alone rarely resolves an intermittent solenoid code. It is a supporting step, not a guaranteed fix.
No. Replacing the control module is almost never the correct fix for this code. The solenoid itself, wiring, and connector issues are far more common and should be ruled out first.
No. Solenoid 'D' refers to a specific position or function in the transmission's pressure control system, but the exact part, location, and design vary by transmission family. Always consult the service manual for that transmission.