linablaze98
Seat Formentor Active Hood Fault
Summary of the thread
A 2021 Seat Formentor displayed an "Active hood fault" message and an airbag warning light, indicating a potential issue with the car's safety systems. The problem was suspected to be caused by a defective acceleration sensor, which can trigger the active hood mechanism. It was recommended to check the impact sensor, as it could also cause such faults. Ultimately, the faulty acceleration sensor was replaced at a workshop, resolving the issue.
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4 comment(s)
linablaze98 (community.author)
Interesting Where exactly is that impact sensor located, and is there any way to test it without specialized equipment?
johannesjung3
Yes, the impact sensor is indeed the likely cause. Unfortunately, it's not easily testable without diagnostics. The sensor provides input to the airbag control unit, and when it detects an issue it can trigger the active hood. It's best to get it checked by a workshop to avoid further complications with the pedestrian safety system.
linablaze98 (community.author)
Took the Formentor to the workshop, and you were right. The acceleration sensor was faulty. They replaced it, cleared the error codes, and everything's back to normal. Total cost was 315€, annoying but at least the car safety system is working again. Thanks a lot for your help!
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SEAT
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FORMENTOR
johannesjung3
I had a similar issue with my Formentor. The active hood fault message popped up along with the airbag warning light. From what you describe it sounds like a system fault. Did you check the impact sensor? That can trigger the active hood mechanism unnecessarily.