U1358 – Control Module Communication Failure

The ODBII code U1358 indicates a “Control Module Communication Failure,” which means there is a problem with the communication between various control modules in the vehicle, potentially affecting their ability to exchange data properly.

Moderate to Severe.

Common Causes For: U1357 U1357: “Control Module Communication Failure”

• Faulty control module
• Poor electrical connections
• Damaged wiring harness
• Corroded connectors
• Software issues or bugs
• Low battery voltage
• Interference from aftermarket devices
• Faulty CAN bus communication
• Grounding issues

Common misdiagnosis for U1358 U1358: “Control Module Communication Failure”

• Faulty control module
• Wiring issues
• Poor ground connections
• Corrupted software/firmware
• Faulty sensors
• Battery or charging system problems
• Intermittent connection issues
• Communication network failures (CAN bus issues)

Common Troubleshooting Steps

The OBD-II code U1358 indicates a “Control Module Communication Failure.” This code typically suggests that there is a problem with communication between various control modules in the vehicle. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, other codes can provide context or lead to the root cause of the communication failure.
• Inspect Wiring and Connectors: **Visual Inspection: Check the wiring harnesses and connectors associated with the control modules for any signs of damage, corrosion, or loose connections.
• **Repair or Replace: Repair any damaged wires or connectors and ensure that all connections are secure.
• Check Power and Ground: **Power Supply: Verify that the control modules are receiving the correct voltage. Use a multimeter to check the power supply to the affected modules.
• **Ground Connections: Ensure that all ground connections are clean and secure. Poor grounding can lead to communication issues.
• Inspect Control Modules: **Module Functionality: If possible, test the affected control module(s) to ensure they are functioning correctly. This may involve swapping with a known good module if available.
• **Software Updates: Check if there are any software updates available for the control modules. Sometimes, manufacturers release updates to fix communication issues.
• Check for Interference: **Aftermarket Accessories: If any aftermarket accessories (like alarms, radios, or other electronic devices) have been installed, they may interfere with communication. Temporarily disconnect them to see if the issue resolves.
• Perform a Network Test: **CAN Bus Testing: If your vehicle uses a Controller Area Network (CAN) bus, use a scan tool capable of performing a network test to check for communication errors between modules.
• **Signal Integrity: Check for proper signal integrity on the CAN bus lines. Look for short circuits, open circuits, or noise on the lines.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears.
• Consult Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures related to the U1358 code. This may provide additional insights or steps tailored to your vehicle’s make and model.
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s specific systems. By following these troubleshooting steps, you can systematically identify and resolve the underlying cause of the U1358 code.