• Anti Theft Security Siren Alarm Horn Set 1. Fit For Tiguan 2008-2018. ◆ 01134 - Alarm Horn (H12): No Signal/Communication. Fault of the ECU itself: As the core component of the vehicle's brain, when there is a problem with its internal circuit or software, it will cause abnormal communication with the alarm horn, and then display this fault code.
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