u1173 u1173 communication network fault detected

What it means:

Description: Communication network fault detected

Definition: This code indicates a problem with the vehicle’s communication network, often related to issues in data transmission between control modules.

Common Causes:

Communication Network Fault Detected

• Faulty or damaged wiring harness
• Poor electrical connections
• Malfunctioning control module
• Network communication issues between modules
• Software or firmware issues in the control module

Common Misdiagnosis:

Communication Network Fault Detected – Common Misdiagnosis: Replacing the control module without checking for wiring issues or connector problems.

Common Diagnostic Steps:

OBD2 Code: U1173
Description: Communication Network Fault Detected
Common Diagnostic Steps:

• Check for any additional trouble codes that may be stored in the vehicle’s computer.
• Inspect all related wiring and connectors for damage, corrosion, or disconnection.
• Verify the integrity of the communication network by checking voltage and ground connections.
• Use a scan tool to monitor live data and ensure proper communication between modules.
• If necessary, perform a continuity test on the communication lines to detect any breaks or shorts.
• Consult the vehicle’s service manual for specific diagnostic procedures related to this code.