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elizabethberger2

Seat Ateca Immobilizer Issue

I'm having an issue with my 2017 Seat Ateca with a gasoline engine. I am experiencing what appears to be an immobilizer problem. The engine either fails to start entirely, or it starts briefly before cutting out abruptly. I have retrieved an error code related to the immobilizer. I suspect the key's programming may be incorrect. Has anyone else encountered a similar issue, and what troubleshooting steps did you undertake?

Summary of the thread

A 2017 Seat Ateca owner experienced an immobilizer issue where the engine either failed to start or started briefly before cutting out. The problem was suspected to be related to the key's programming. It was suggested to try a spare key to determine if the issue was with the primary key's transponder. After visiting a specialized workshop, the key was recoded, resolving the issue without needing a full immobilizer replacement.

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4 comment(s)

raphaeldunkel10

Sounds like a classic immobilizer fault. The brief start and then immediate stall is a common symptom. Does the error memory specify anything more specific than just an immobilizer fault? Have you tried your spare key, if you have one? It would help rule out a general car electronics issue versus a specific key signal problem.

elizabethberger2 (community.author)

The error code is somewhat generic, pointing only to a general malfunction in the anti-theft system. I have not tried my spare key yet. If the spare key works, does that definitively indicate an issue with the primary key's transponder, or could it still be a problem with the ignition control module itself?

raphaeldunkel10

If the spare key works, it's highly probable that the issue lies solely with the primary key. While a faulty ignition control module could theoretically cause similar symptoms, the fact that a different key resolves the issue strongly suggests a problem specific to the original key's transponder. Recoding or replacing the problematic key would be the logical next step. I'd advise taking it to a workshop specializing in car electronics and security systems.

elizabethberger2 (community.author)

I took it to a workshop specializing in car electronics. The key's programming was the culprit. They recoded the key, and the anti-theft system now recognizes it. Total cost was 45€, a relief compared to a full immobilizer replacement. Thanks for pointing me in the right direction!

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SEAT

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ATECA