Transmission Park Lock Solenoid Malfunction

What this code means

The park lock solenoid that secures the transmission in Park has a malfunction. This solenoid also enables shift-by-wire park release.

Symptoms

• Vehicle will not shift out of Park
• Park indicator flashing
• Key cannot be removed (if applicable)
• Vehicle may roll when parked
• Shift lever moves but no gear engagement
• Override button required to shift from Park

Common causes

• Park lock solenoid failure
• Solenoid wiring fault
• Shift interlock switch failure
• Brake switch not sending signal to solenoid
• Mechanical park pawl issue

Diagnostic steps

1. Test park lock solenoid operation via scan tool
2. Check brake switch signal to TCM
3. Test solenoid wiring continuity
4. Inspect park pawl mechanism
5. Check shift interlock system

Repair notes

Replace park lock solenoid. Verify brake switch operation. Check park pawl engagement. SAFETY CRITICAL - vehicle must hold securely in Park.

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