2008 Cadillac CTS
Key Replacement - Save vs Dealer in San Diego

2008 Cadillac CTS Smart Key Replacement - Fast, Affordable & Professional

I got a call from a woman in Eden Gardens, Solana Beach. She was parked outside the tailor shop and her CTS was doing something weird. It would start fine in the morning, but by midafternoon the push-button start would just sit there. No response. She'd tried a new CR2032 already. Thought it was an electrical gremlin in the car itself.

When I got there, she mentioned another locksmith had replaced her key a few weeks back. That detail changed everything.

I checked the fob and the car's response to it. The vehicle security system was intermittently rejecting the key, not ignoring it entirely, but failing it after the initial pass. That pattern points to a programming issue, not a dead battery, not a bad car. The key looked right on the surface but the transponder chip inside had not been matched correctly to this vehicle. It passed the first handshake sometimes and failed the deeper verification other times, which is exactly the kind of thing that makes an owner think the car has a wiring problem.

I programmed a new fob correctly to her vehicle, confirmed the chip was properly enrolled, and walked through every function before I packed up. She watched the whole thing on the hood of her car in the afternoon sun.

The relief on her face when the start button worked three times in a row without hesitation was the whole job right there. She'd been second-guessing the car for weeks. It was never the car.

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