Shift Solenoid A Stuck On
Shift Solenoid A Stuck On: the actuator is stuck in the on position. Shift solenoids route transmission hydraulic pressure to engage the gears; faults cause harsh, delayed, or missed shifts.
Affected components
- Shift solenoid a
Common causes
- High likelihood: Solenoid stuck open
- Low likelihood: Carbon or debris buildup preventing free movement
- Low likelihood: Component wear with age - mechanical play
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.