U0164
Lost Communication with HVAC Control Module
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
Low SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the climate control module.
Symptoms
- Climate control not working
- No A/C
- Fan not responding
Common Causes
- HVAC module failure
- Fuse
- CAN bus
- Wiring
Diagnostic Steps
- Check fuses
- Test power
- Check CAN wiring
Repair Notes
Check fuses and power supply.
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
U0164 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code U0164 mean on a 2018-2025 Fiat Cronos?
U0164 stands for "Lost Communication with HVAC Control Module". Cannot communicate with the climate control module.
What are the symptoms of U0164 on a Fiat Cronos?
Common symptoms of U0164 include: Climate control not working, No A/C, Fan not responding.
What causes U0164 on a 2018-2025 Fiat Cronos?
Common causes of U0164 include: HVAC module failure, Fuse, CAN bus, Wiring.