What Does U0104 Mean?
Communication has been lost between the powertrain control module and the cruise control module on the vehicle network. The cruise control system will likely be inoperative.
Common Causes
35%
Damaged or corroded wiring and connectors to cruise control module
30%
Failed cruise control module
20%
CAN bus communication fault
10%
Loss of power or ground to cruise control module
5%
Module software issue or incorrect programming
Diagnostic Steps
1
Step 1: Check all related fuses and verify power supply to cruise control module
2
Step 2: Inspect cruise control module connector for corrosion, bent pins, or water intrusion
3
Step 3: Test CAN bus signals at cruise module connector using oscilloscope or multimeter
4
Step 4: Check for additional communication codes to identify network-wide issues
5
Step 5: Attempt module reprogram/update or replace cruise control module if other tests pass
Estimated Repair Cost
$120 - $700
Parts + labor, varies by vehicle and location
Communication has been lost between the powertrain control module and the cruise control module on the vehicle network. The cruise control system will likely be inoperative.
The most common cause of U0104 (Lost Communication With Cruise Control Module) is: Damaged or corroded wiring and connectors to cruise control module
Typical repair costs for U0104 range from $120 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cruise control will not function, but vehicle remains drivable. No immediate safety concern, though loss of cruise control on highways may cause driver fatigue.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0104 to identify the root cause.
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Quick Info
Category
Network
System
Cruise Control / Network Communication
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
