1. Check the Key:
* Battery: The key fob's battery may be low. Try replacing the battery in your key fob. This is the most common cause.
* Key Position: Ensure the key is properly inserted and fully engaged in the ignition switch. Try gently wiggling it.
* Try a Spare Key: If you have a spare key, try using that to see if the problem lies with the key itself. If the spare key works, you'll need to get the original key repaired or replaced.
2. Check the Car's System:
* Key Proximity: Some Ford Fiestas use keyless entry. Make sure the key fob is close enough to the car. Try bringing it closer to the ignition or steering column.
* Antenna: The car's immobiliser antenna might be faulty. This is located within the ignition switch or steering column and can be damaged or become disconnected. This usually requires professional attention.
* Battery: A weak car battery can sometimes affect the immobiliser system. Try jump-starting the car to see if that resolves the issue. If the problem persists after jump starting, the battery may need replacing.
* PATS System (Passive Anti-Theft System): The PATS system is what the immobiliser uses. A malfunction within this system will require a diagnostic scan.
3. Seek Professional Help:
If none of the above steps work, the problem is likely more complex and requires a diagnostic scan using a Ford-specific OBD-II scanner. A mechanic will be able to determine the precise cause of the problem, whether it's a faulty key, a problem with the immobiliser system, or another issue.
Important Note: Do not attempt to bypass the immobiliser system. Doing so is illegal and can damage your car's electronics. Always consult a qualified mechanic for diagnosis and repair.
