Key Copy Doesn't Work When Starting the Engine – Solution with a Certified Locksmith in Puerto Rico
¿Por qué una copia de llave no enciende el vehículo?
Cuando una copia de llave abre las puertas pero no enciende el carro, el problema casi siempre está en el sistema electrónico (transponder). Como Certified Locksmith en Puerto Rico, esto ocurre frecuentemente cuando la copia no fue programada correctamente.

Key without chip or unprogrammed transponder
Many copies only replicate the mechanical cut, but do not include electronic programming for ignition.
Incorrect or incomplete programming
The chip may be present, but if it is not synchronized with the vehicle, the security system will block the start.
Common situations in this problem
The key unlocks the doors but the car won't start.
It indicates that the mechanical part works, but the immobilizer system does not recognize the key.
Safety light on the dashboard
This indicates that the vehicle does not validate the transponder chip.
What can you try before calling?
Try with the original key
If the original turns on, the problem is with the copy.
Check if the copy has a chip.
Some budget keys do not include a transponder.
Home diagnosis and solutions in Puerto Rico
At ServicioCerrajero – Certified Locksmith , we fix this problem right on the spot.
Correct programming of chip key
We synchronize the copy with the vehicle's system to enable ignition.
Creating a new compatible key
If the copy is not suitable, we generate a new key with a programmed chip.
Immobilizer system diagnosis
We confirm whether the problem is with the key or the vehicle.
Advantages of working with a Certified Locksmith
• Home delivery service in Puerto Rico
• Immediate professional scheduling
• Savings compared to dealerships
• Complete diagnosis
• Quick and safe solution
Frequently asked questions about key duplication
Can any copy start the car?
No, it must have a chip and be programmed correctly.
Can a copy be scheduled after it's been made?
Yes, provided the key has the correct chip.
🚨 Is your spare key not starting the vehicle?
At ServicioCerrajero – Certified Locksmith in Puerto Rico , we offer on-site programming and repair services to ensure your key works properly.
📞 Call 787-664-8885 and receive immediate assistance.
