Gear Shift Lock Solenoid/Actuator A Performance/Stuck On
The shift lock solenoid for selector lever A stays engaged when release is commanded. Driver cannot move the selector out of Park or away from the locked gate.
Affected components
- Shift lock solenoid a
- Shift lock actuator a
- Tcm
Common causes
- High likelihood: Lock actuator mechanically stuck
- Medium likelihood: Control 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
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.