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P2708 — Shift Solenoid F Stuck

Manufacturer-specificPowertrain (engine & transmission)

P2708 signals that the transmission's shift solenoid F is stuck or not responding to commands from the control module.

Symptoms

What causes it — most likely first

1. Failed shift solenoid F

The solenoid's internal coil or plunger can wear out or become mechanically stuck, preventing proper operation.

2. Electrical fault in the solenoid circuit

Open or shorted wiring, corroded connector pins, or loose terminal can interrupt the signal to the solenoid.

3. Low or contaminated transmission fluid

Insufficient lubrication or debris in the fluid can cause the solenoid valve to stick, especially after prolonged use.

4. Faulty transmission control module (TCM) or PCM driver circuit

A rare issue where the module's output driver fails, but this is typically considered only after the solenoid and wiring are verified.

How it's diagnosed

  1. Inspect the shift solenoid F's electrical connector for corrosion or damage.
  2. Measure the solenoid's resistance and compare it to manufacturer specifications.
  3. Check transmission fluid level and condition; replace or flush if low or dirty.
  4. Monitor solenoid command and response using a scan tool while shifting through gears.
  5. If all else is normal, test the TCM/PCM driver circuit for output voltage or consider replacement.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2700 — Transmission Friction Element Apply TiP2701 — Transmission Friction Element B Apply P2702 — Transmission Friction Element C Apply P2703 — Transmission Friction Element D Apply P2704 — Transmission Friction Element E Apply P2705 — Transmission Friction Element F Apply

Frequently asked

Do I need to replace the PCM to fix P2708?

No. The PCM is rarely the cause; most cases are resolved by addressing the solenoid, its wiring, or fluid condition.

Can I continue driving with this code?

The vehicle may still operate, but shifting will be impaired and could lead to further transmission damage if ignored.

How common is this code?

It appears relatively frequently in high‑mileage automatic transmissions, especially when fluid maintenance has been neglected.

Will a fluid change always clear P2708?

Sometimes, if the issue is fluid‑related; however, if the solenoid is mechanically stuck, replacement is required.