susanhuber49
Skoda Fabia Diesel Immobilizer Problem
Summary of the thread
A 2004 Skoda Fabia with a diesel engine is experiencing starting issues, suspected to be related to the immobilizer system. The problem may stem from incorrect key programming or interference affecting the ignition control. It is suggested to check the key signal, as a weak key fob battery or interference could cause the issue. Ultimately, taking the car to a workshop for diagnostics and key reprogramming resolved the problem.
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4 comment(s)
susanhuber49 (community.author)
Key signal, you say? How exactly do I check that? I've noticed the security light blinking a bit more than usual, but I assumed it was related to the anti-theft system freaking out. Any specific tests I can run?
hannessilber7
Yeah, the key signal is what the car reads to allow starting. I couldn't test it myself, needed diagnostics. The workshop confirmed it was the key not being recognized properly by the anti-theft system. Honestly, save yourself the headache and take it to a workshop with the right equipment for key programming. They can diagnose it properly and reprogram the key if needed.
susanhuber49 (community.author)
Right, thanks for the advice. I took it to a workshop, and it turned out the key programming was indeed the issue. They reprogrammed the key, and it's working fine now. Cost me 45€.
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SKODA
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FABIA
hannessilber7
Sounds like an immobilizer issue. I had similar problems with my Peugeot 207 a while back. Same symptoms: engine would start then die, security light flashing. Have you checked the key signal? Sometimes a weak battery in the key fob can cause this, or even interference.