U0166
Lost Communication with Auxiliary HVAC Control Module
2012-2016 Ferrari FF 6.3L V12 🇨🇦
Low SeverityNetwork
Description
Cannot communicate with auxiliary heater or auxiliary climate module.
Symptoms
- Auxiliary heater not working
- Pre-conditioning not available
- Remote start climate control disabled
Common Causes
- Auxiliary HVAC module failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic Steps
- Check auxiliary HVAC fuse
- Test power and ground
- Check CAN wiring
- Test auxiliary heater element
Repair Notes
Check fuses for auxiliary climate system.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0166 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 U0166 mean on a 2012-2016 Ferrari FF?
U0166 stands for "Lost Communication with Auxiliary HVAC Control Module". Cannot communicate with auxiliary heater or auxiliary climate module.
What are the symptoms of U0166 on a Ferrari FF?
Common symptoms of U0166 include: Auxiliary heater not working, Pre-conditioning not available, Remote start climate control disabled.
What causes U0166 on a 2012-2016 Ferrari FF?
Common causes of U0166 include: Auxiliary HVAC module failure, CAN bus wiring, Module power loss, Fuse blown.