Theft Deterrent Horn Circuit
2012-2016 Ferrari FF 6.3L V12
Description
Malfunction in the theft deterrent horn/siren circuit. The alarm horn or siren does not sound during alarm activation.
Symptoms
- No horn sound during alarm
- Alarm triggers silently
- Horn works normally otherwise
- Security light still flashes during alarm
Common Causes
- Faulty alarm siren
- Wiring damage to dedicated siren
- BCM siren output failure
- Siren connector disconnected
Diagnostic Steps
- Test alarm siren with direct power
- Check wiring from BCM to siren
- Test BCM siren output
- Inspect siren connector
- Verify siren ground
Repair Notes
Replace alarm siren or repair wiring. Check for dedicated siren separate from horn.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0009Rear Center Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
B0121 on Other Vehicles
Ferrari 296 GTB
2022-2024 3.0L V6 Hybrid
Ferrari 296 GTS
2022-2024 3.0L V6 Hybrid
Ferrari 360 Challenge Stradale
2003-2005 3.6L V8
Ferrari 360 Modena
1999-2005 3.6L V8
Ferrari 430 Scuderia
2007-2009 4.3L V8
Ferrari 456 GT
1993-2003 5.5L V12
Ferrari 458 Italia
2009-2015 4.5L V8
Ferrari 458 Speciale
2013-2015 4.5L V8
Common Questions
What does code B0121 mean on a 2012-2016 Ferrari FF?
B0121 stands for "Theft Deterrent Horn Circuit". Malfunction in the theft deterrent horn/siren circuit. The alarm horn or siren does not sound during alarm activation.
What are the symptoms of B0121 on a Ferrari FF?
Common symptoms of B0121 include: No horn sound during alarm, Alarm triggers silently, Horn works normally otherwise, Security light still flashes during alarm.
What causes B0121 on a 2012-2016 Ferrari FF?
Common causes of B0121 include: Faulty alarm siren, Wiring damage to dedicated siren, BCM siren output failure, Siren connector disconnected.