Transponder Key Programming in Upper Providence, Delaware County, PA

A blinking security light on your dash may mean your car is not recognizing the signal from the chip inside your key.

The engine might crank without starting, though the light alone does not prove that the chip is the problem. In Upper Providence, we make transponder keys and program them to communicate with the car's immobilizer. A copy cut from plain metal may fit the door and turn in the ignition, but it will not start a car that requires a paired chip.

If you need a spare in Upper Providence, we can add it to the car's memory while keeping your existing ones usable, where the vehicle allows it. If one is lost, you can also choose to have it removed from that memory. The missing one should then no longer be recognized for starting, even if it still fits a door lock. We will explain what your vehicle supports and whether the ones you still have need to be programmed again.

When the key turns but the engine will not start, we look at the key and the security light, and ask you to show us what happens when you turn it.

A car that cranks without starting can have causes unrelated to the key, so a blinking light alone does not settle the question. The chip inside sends a signal that the car must recognize before it allows the engine to start. A copy cut to fit the ignition may turn but lack a working chip.

You may be able to add another key to the car's memory or remove lost ones from it. Some cars require the remaining ones to be paired again when lost ones are removed. A removed copy may still unlock a door, but should no longer start the vehicle. Before work begins, we explain the available choices and any limits for your car. After programming, we check the security light and ask you to start the vehicle with each one we paired. If it still will not start, we explain what the check showed rather than assume the transponder was the cause.

A copy cut without a transponder chip may fit the door and turn in the ignition, but it will not give the car the signal it needs to start.

Keep that copy apart from your programmed keys so you do not mistake it for a working spare. Protect the programmed ones from water, hard impacts and extreme heat. Store a working spare somewhere secure, separate from the one you carry. Test it by starting the car, rather than assuming it works because it turns.

If the security light blinks or the engine cranks but does not start, the problem may involve the programmed key, though other car problems can cause similar symptoms. Try your working spare if you have one. If neither starts the car, or a previously working one stops being recognized, it is worth calling us again. You can also ask us to remove a lost copy from the car's memory. The car should no longer recognize it for starting, but it may still open a door if it fits.