B102012 — Horn short to power
Quick answer
B102012 indicates a short circuit in the horn circuit, so the horn may sound continuously or not work at all.
What to check first
- Read all stored fault codes with a scan tool and deal with related codes first.
- Check the 12 V battery state of charge and terminals; a weak 12 V supply causes many electronic faults.
- Inspect the fuses that protect this circuit.
Symptoms you may notice
- Horn does not sound
- Horn sounds weak or single-tone
- B102012 stored in the BCM
- Horn fuse blowing
Can I still drive?
Usually drivable — have it checked soon. If in doubt, park the car and ask a technician — a fault that limits power or shuts the high-voltage system down will not clear by itself.
Parts for B102012
A fault code points to a system, not always to one part. Work through the checks above first. If they point to a part, these are the references usually involved. The right version depends on the build, so it is confirmed against the VIN before anything is quoted.
| Part | OE reference | |
|---|---|---|
| Low-tone horn | 861984301B | View reference |
Need one of these parts? Send us the fault code, the VIN and a photo of the part or its label. We check the reference against the VIN, then tell you what we can supply, the price and the lead time.
Frequently asked questions
Can I drive an Aiways U5 with B102012?
Usually drivable — have it checked soon. If in doubt, park the car and ask a technician — a fault that limits power or shuts the high-voltage system down will not clear by itself.
What does B102012 mean?
B102012 indicates a short circuit in the horn circuit, so the horn may sound continuously or not work at all.
What should be checked first for B102012?
Read all stored fault codes with a scan tool and deal with related codes first. Check the 12 V battery state of charge and terminals; a weak 12 V supply causes many electronic faults. Inspect the fuses that protect this circuit.
Which parts can be involved in B102012?
Depending on what the checks show: Low-tone horn. A fault code points to a system, not always to one part, so confirm the cause before replacing anything.
Other Body Control Module (BCM) codes for the Aiways U5
Need the part or a second opinion?
Send the fault code and your VIN. We confirm the reference against the VIN, then tell you availability, price and lead time. We ship from China to workshops and distributors across Europe.