Shift Solenoid F Stuck On
Shift solenoid F stays in the activated state when commanded off. Affected gear stays applied so the transmission cannot shift correctly.
Affected components
- Shift solenoid f
- Valve body
Common causes
- High likelihood: Solenoid spool stuck in open position
- Medium likelihood: TCM output driver stuck on
- Low likelihood: Carbon or debris buildup preventing free movement
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.