Gear Shift Lock Solenoid/Actuator A Stuck Off
The shift lock solenoid for selector lever A does not engage when commanded. The selector can be moved without the safety interlock active.
Affected components
- Shift lock solenoid a
- Shift lock actuator a
- Tcm
Common causes
- High likelihood: Lock actuator failed mechanically
- Medium likelihood: Open in solenoid control wire
- 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
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.