U0164 on Chrysler
Lost Communication With HVAC Control Module
U0164 on Chrysler vehicles indicates lost communication with hvac control module. Au7o has documented this code across 1 Chrysler model — most commonly on Crossfire. This network code means another module on the vehicle's communication bus stopped receiving expected messages from the HVAC (climate control) module. Modern vehicles share data over networks like CAN, and when the HVAC module goes silent for too long, this code is set. It usually points to a power, ground, wiring, or bus fault rather than a climate-comfort issue itself. Climate controls may stop responding correctly, but it does not affect the vehicle's ability to drive. Typical repair costs on Chrysler range from $100 to $800, depending on the specific model and root cause.
Common Causes of U0164
- •Loss of power or ground to the HVAC module
- •Wiring or connector fault on the communication bus
- •Corroded or loose HVAC module connector
- •Faulty HVAC control module
- •Network/bus wiring damage or short affecting multiple modules
- •Gateway or related module fault disrupting the bus
U0164 on Chrysler by Model
Chrysler Crossfire(1 issue)
- SAM (Signal Acquisition Module) Water Intrusion2004-2008
The SAM module (Mercedes-sourced body control module) located in the trunk area suffers from water intrusion causing corrosion of circuits. This triggers random electrical faults including lighting, power window, and central locking failures.
Looking for U0164 on a different make?
View U0164 across all makes →Frequently Asked Questions
What does U0164 mean on Chrysler?▼
U0164 stands for "Lost Communication With HVAC Control Module." This network code means another module on the vehicle's communication bus stopped receiving expected messages from the HVAC (climate control) module. Modern vehicles share data over networks like CAN, and when the HVAC module goes silent for too long, this code is set. It usually points to a power, ground, wiring, or bus fault rather than a climate-comfort issue itself. Climate controls may stop responding correctly, but it does not affect the vehicle's ability to drive. On Chrysler specifically, this code is documented across 1 model.
What causes U0164 on Chrysler vehicles?▼
Common causes on Chrysler: Loss of power or ground to the HVAC module, Wiring or connector fault on the communication bus, Corroded or loose HVAC module connector, Faulty HVAC control module, Network/bus wiring damage or short affecting multiple modules. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0164 on a Chrysler?▼
Repair costs on Chrysler range from $100 to $800, depending on the specific model and root cause.
Which Chrysler models have U0164 documented?▼
Au7o has documented U0164 on 1 Chrysler model: Crossfire.