Here's what could be causing this:
* Faulty ignition key: The transponder chip in your key might be damaged or malfunctioning. Try all available keys. If one works, the problem is isolated to that key. If none work, the problem lies elsewhere.
* Weak or failing battery in the key: The key's internal battery might be low. Try replacing the battery in your key fob.
* Faulty PASS-Key system receiver: The receiver in your vehicle that reads the key's transponder might be malfunctioning. This requires professional diagnosis and likely replacement.
* Security system module problem: The main security module itself could be failing or damaged. This also requires professional diagnosis and repair.
* Wiring issues: Damaged or corroded wiring in the security system circuit could interrupt communication.
* Immobilizer module problem: This is a component closely related to the security system and may be the source of the issue.
What to do:
1. Try all available keys: This is the easiest and quickest thing to check.
2. Replace the battery in your key fob (if applicable): This is a cheap and easy fix that could solve the problem.
3. Have the vehicle professionally diagnosed: This is crucial if steps 1 and 2 don't work. A qualified mechanic with diagnostic equipment can pinpoint the exact cause of the problem. They can test the key, the receiver, the security module, and the wiring.
Do NOT attempt to bypass the security system yourself. This is complex and can damage the vehicle's electrical system. It's important to get it properly diagnosed and repaired by a professional.
