u1172 control module communication fault
OBD2 Code: U1172
Description: Control Module Communication Fault
Definition: This code indicates a loss of communication between the vehicle’s control modules. It suggests that one or more modules are not able to communicate with each other over the network, which can affect various systems in the vehicle.
P0600 – Serial Communication Link
Severity: Moderate
U0073 – Control Module Communication Bus A Off
Severity: Severe
Common Causes
Description: A u1172 code indicates a communication fault with the control module.
Common Causes:
- Faulty wiring or connections
- Defective control module
- Interference from other electronic devices
- Software issues
Common Misdiagnosis
Code: U1172
Description: Control Module Communication Fault
Common Misdiagnosis: Replacing the control module without checking for wiring issues or network communication problems.
Common Diagnostic Steps
Description: Control Module Communication Fault
- Check for any other stored trouble codes that might indicate a related issue.
- Inspect all relevant wiring and connectors for damage, corrosion, or disconnection.
- Verify the integrity of the control module ground connections.
- Use a scan tool to check for communication between the control modules.
- Test the battery voltage and charging system to ensure proper power supply to the modules.
- If applicable, update or reprogram the control module software as per manufacturer guidelines.
- If no issues are found with wiring or connections, consider testing or replacing the affected control module(s).