Here are some possible causes and troubleshooting steps:
* Faulty Passlock Sensor Ring: This ring is located around the ignition cylinder. Over time, it can wear down, become misaligned, or get damaged, preventing the system from recognizing the key. This is a common cause. You might need a new sensor ring or even a new ignition cylinder.
* Weak or Failing Battery: A weak battery can sometimes prevent the Passlock system from functioning correctly. Try jump-starting the car with a good battery and see if it starts. If it does, you likely need a new battery.
* Faulty Ignition Switch: The ignition switch itself could be malfunctioning and not properly communicating with the Passlock system. This is less common but possible.
* Problem with the Passlock Module (PCM): The PCM is the brain of the anti-theft system. A faulty module will require replacement. This is usually diagnosed by a mechanic using a scan tool.
* Damaged Wiring: Wiring related to the Passlock system could be damaged or corroded. This is harder to diagnose and usually requires professional help.
* Incorrect Key: Although you've tried the reset, ensure you're using the correct key. A damaged or copied key might not be recognized properly.
What you should do:
1. Check the Battery: Test the battery voltage. A low voltage can cause starting problems and interfere with the Passlock system.
2. Try a Different Key (if available): If you have a spare key, try using it.
3. Professional Diagnosis: Since you've already tried the reset, a professional mechanic with a scan tool is the best option. They can properly diagnose the issue, identify the faulty component (sensor ring, ignition switch, Passlock module, etc.), and make the necessary repairs. Attempting to repair the Passlock system yourself without proper knowledge can be frustrating and potentially damaging.
The cost of repair can vary depending on the specific problem. A new sensor ring might be relatively inexpensive, while replacing the PCM or ignition switch could be more costly. Getting a professional diagnosis is the most efficient way to determine the cost and necessary repairs.
