Mustang immobilizer problem

I am experiencing an immobilizer problem with my 2001 Ford Mustang, gasoline engine, with 90418 km on the clock. The engine either fails to start, or starts briefly and then cuts out. An error is also stored in the error memory. I suspect incorrect key programming.

4 comment(s)

I had similar issues with my 2012 Opel Astra. The anti-theft system went crazy. Does the security light flash when you try to start it? Have you tried your spare key to rule out a faulty transponder in the primary key?

Yes, the security light does flash. I have not yet tried the spare key. If the spare key exhibits the same problem, what would be the next logical step in diagnosing the fault?

When the spare key did not work on my Astra, it unfortunately pointed to a deeper issue with the immobilizer system itself. While some suggest immobilizer bypass, I would recommend taking it to a workshop with the right diagnostic tools. They can recode the key or diagnose a faulty receiver.

Thank you for the advice. The workshop confirmed the key programming was incorrect. They reprogrammed the key, and the issue is now resolved. Total cost: 45€.

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