How do I know if my Ford has pats?
Most Ford models built since the mid-1990s include a Passive Anti-Theft System (PATS), also known as SecuriLock, which uses a transponder in the key to authorize starting. You can often identify it by a transponder-equipped key and a security/immobilizer indicator on startup. If you want a definitive answer, check your owner’s manual or contact a Ford dealer with your VIN.
Understanding Ford's PATS
PATS is Ford’s immobilizer system. The key contains a small transponder chip that must be recognized by the vehicle’s computer for the engine to start. If the system does not recognize the key, the engine will not start and a security light may flash or stay on. This technology helps deter theft and is standard on many Ford models produced from the late 1990s onward.
How to tell if your Ford has PATS
Key indicators to look for
Use these indicators to determine whether your Ford uses PATS. The following signs are typically reliable across most models:
- Transponder-equipped key: The key’s plastic head often contains a small chip; if your key has a chip, it is likely designed for PATS.
- Security/anti-theft indicator on startup: When you turn the ignition to RUN, a security or key symbol (anti-theft light) should illuminate briefly and then go out if the key is recognized. If the light stays on or blinks, the system isn’t recognizing the key.
- Starting behavior with keys: With a programmed Ford key, the engine should start. A non-programmed or damaged key may crank but fail to start, indicating an immobilizer is in use.
Conclusion: The combination of a transponder-equipped key, a dash security light that behaves as described, and typical start-up behavior is a strong indication that your Ford has PATS.
Get a definitive answer from Ford
For certainty, verify with Ford using your vehicle identification number (VIN). A dealership or licensed locksmith can confirm whether PATS/SecuriLock is installed for your exact model year and trim, and whether your keys are properly programmed.
- Provide your VIN and model year to the dealer; they can verify factory equipment and service bulletins related to PATS.
- Ask for an immobilizer/SecuriLock status check or a key programming history if you’ve had multiple keys.
- If you need new keys, ensure you have sufficient programmed keys to avoid immobilizer lockout.
Conclusion: VIN-based confirmation plus dealer verification is the most reliable way to determine PATS status for your Ford.
What to do if your Ford has PATS but you’re having problems
If you’re dealing with a no-start condition or a persistent security light, follow these best-practice steps to diagnose and address immobilizer issues, while avoiding risky DIY techniques.
- Try a known-good key: If you have a spare programmed key, see whether it starts the car. If yes, the issue may be with the other key.
- Inspect the key for damage: Worn or damaged transponder keys can fail to communicate with the immobilizer; replace with a spare if available.
- Check dash indicators during start: A steady or flashing security light often signals immobilizer trouble and warrants professional diagnosis.
- Avoid self-reprogramming attempts: Reprogramming PATS keys typically requires specialized tools and codes used by dealers or licensed locksmiths.
- Seek professional help: Contact a Ford dealer or licensed automotive locksmith with proof of ownership. They can reprogram keys, diagnose immobilizer faults, or replace the immobilizer module if needed.
Conclusion: Immobilizer-related problems generally require professional service. Having two working programmed keys on a PATS-equipped Ford is advisable to prevent lockout scenarios.
Summary
Ford’s Passive Anti-Theft System (PATS), often referred to as SecuriLock in older materials, uses a transponder in the key to authorize starting. Most Ford models since the late 1990s are equipped with PATS. You can identify it by a transponder-equipped key, a security/immobilizer indicator on startup, and typical start-up behavior with programmed keys. For a definitive determination, consult your owner’s manual or a Ford dealer with your VIN. If you lose keys or face immobilizer failures, rely on a professional locksmith or dealer for safe programming and repair.
