Pinpoint Test O : Transmission Stuck In Park

• Low line pressure 
  • Carry out the line pressure test. If line pressure is low, refer to the Line Pressure Diagnosis Chart for further diagnosis. REFER to: Special Testing Procedures .

• Park lock pawl solenoid 
  • Check the park lock pawl solenoid pin for being stuck extended. REFER to: Park Lock Pawl Solenoid .

• Internal transmission park components 
  • Inspect the park pawl, park pawl actuator rod, TR sensor and park return spring for damage or binding. Make sure all park components are properly installed and connected. REPAIR or INSTALL new components as necessary. REFER to: Transmission .
  • Remove and inspect the park lock pawl valve. If the valve or bore is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .

• Park hydraulic circuits blocked or leaking 
  • Disassemble the main control valve body and inspect the park lock pawl valve hydraulic circuits for damage, leaks or blockage. CLEAN or INSTALL new components as necessary. REFER to: Main Control Valve Body .

• Clutch fault 
  • The shift-by-wire variant of the 10R transmission uses hydraulic pressure from the B and D clutches to push the system out of park. Check the B and D clutches for a does not apply condition. REFER to: B Clutch . REFER to: D Clutch .

Possible Sources 

• Low line pressure
• Park lock pawl solenoid
• Park pawl components
• Clutch fault

Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods