sophiastorm1
S2000 Active Hood Fault
Summary of the thread
A 2003 Honda S2000 is experiencing an "Active hood fault" and a constantly lit airbag warning lamp. The issue is linked to the active hood system, with spring actuators triggering randomly. A faulty acceleration sensor, possibly due to corroded or damaged wiring, is suspected as the cause. The recommended solution is to have a professional workshop diagnose and replace the faulty sensor to resolve the issue.
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4 comment(s)
sophiastorm1 (community.author)
Thanks for the suggestion! I haven't specifically checked the wiring to the acceleration sensors yet. Where exactly are they located, and is there a specific way to test them to see if they're faulty? Also, do you know if a defective car sensor would cause the spring actuators to trigger?
alinalehmann65
On the Volvo, the sensors were behind the bumper, near the headlights. I didn't test them myself; I just took it to a workshop. But yes, a faulty sensor can definitely cause the system to activate randomly. If the system thinks there's been a collision, it will trigger the actuators. Honestly, given the airbag light, I'd advise against messing with it too much yourself. It's a safety system, and you don't want to accidentally deploy something or mess up the airbag deployment in a real crash. A scan with a proper diagnostic tool at a shop is likely your best bet. Be prepared to replace the sensor.
sophiastorm1 (community.author)
Okay, I appreciate the advice. I'll take it to a reputable workshop and have them diagnose the system properly. It was indeed the acceleration sensor, as you suspected. The final repair cost was 315€ including replacing the sensor and labor. Thanks again for your help!
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HONDA
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S2000
alinalehmann65
That's a strange one! I had a somewhat comparable issue on my old Volvo V70. Same "pedestrian protection" system, and the error messages were similar. Turned out to be a faulty acceleration sensor. I'm wondering, have you checked the wiring and connections to the sensors in the front bumper? Those can get corroded or damaged, leading to false readings.