However, here's a breakdown of the potential issues and how a professional mechanic would likely approach the repair:
Possible Causes:
* Brake Pedal Switch: This switch signals to the transmission control module (TCM) that the brake pedal is depressed. A faulty switch might not send the correct signal, preventing shifting out of PARK. This is the most common culprit.
* Transmission Control Module (TCM): The TCM interprets signals from various sensors, including the brake pedal switch. A faulty TCM might misinterpret signals or malfunction entirely. This is more complex and expensive to fix.
* Shift Lever Mechanism: Internal mechanical problems within the shift lever assembly can prevent it from releasing the PARK pawl.
* Wiring Harness: Damaged or corroded wiring between the brake pedal switch, TCM, and the shift lever can interrupt signal flow.
* Parking Pawl: This is the mechanical part that locks the transmission in PARK. It could be mechanically jammed or worn. This is usually addressed during a more complete transmission overhaul.
* Low Battery Voltage: In some instances, an extremely low battery voltage can cause erratic behavior, including issues with the brake interlock.
Troubleshooting Steps (For a Professional Mechanic, NOT DIY):
1. Check the Brake Pedal Switch: This is the easiest and cheapest to test. A simple multimeter test can determine if the switch is functioning correctly. Replacement is relatively straightforward.
2. Scan for Diagnostic Trouble Codes (DTCs): Using a professional-grade OBD-II scanner, a mechanic can retrieve diagnostic trouble codes from the TCM. These codes point to specific areas of concern.
3. Inspect the Wiring: Visual inspection of the wiring harness for damage or corrosion is important. This often involves tracing wires from the brake pedal switch to the TCM.
4. Test the TCM: Testing the TCM is more involved and often requires specialized equipment. If the TCM is faulty, it usually needs replacement.
5. Mechanical Inspection of the Shift Linkage: If the electrical components check out, a mechanic might need to manually check the internal mechanism of the shifter to rule out mechanical issues.
What You Should Do:
* Do NOT attempt to force the shifter out of PARK. This could cause damage to the transmission.
* Call a qualified mechanic or tow your vehicle to a Chrysler dealership. They have the diagnostic equipment and expertise to properly diagnose and repair the issue.
* Mention the symptoms clearly: Tell them the vehicle is stuck in PARK and that you suspect a brake interlock problem.
Repair costs will vary greatly depending on the actual cause. Replacing a brake pedal switch is relatively inexpensive, while a new TCM could be significantly more costly. Getting a professional diagnosis is the first and most crucial step.
