U1332 – Control Module Communication Failure

The ODBII code U1332 indicates a “Control Module Communication Failure,” meaning there is a problem with communication between the vehicle’s control modules, which can affect various systems and functions.

The severity of ODBII code U1332 is moderate.

Common Causes For: U1331 Manufacturer Specific” code, which typically indicates a communication issue between modules in the vehicle’s network.

• 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
• Malfunctioning sensors or actuators

Common misdiagnosis for U1332 U1332: “Control Module Communication Failure”

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

Common Troubleshooting Steps

The OBD-II code U1332 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 U1332 code.
• Inspect Wiring and Connectors: **Visual Inspection: Check the wiring 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 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, etc.) have been installed, they could interfere with communication. Temporarily disconnect them to see if the issue resolves.
• **Signal Interference: Ensure that there are no sources of electromagnetic interference near the vehicle’s wiring.
• Perform a Network Test: Use a professional scan tool to perform a network test. This can help identify which module is not communicating properly.
• Check the CAN (Controller Area Network) bus for continuity and proper signal transmission.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears. Monitor the vehicle’s performance and any warning lights.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U1332 code for your specific vehicle make and model. Manufacturers may have specific recommendations or known issues.
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to address complex communication issues. By following these troubleshooting steps, you can systematically identify and resolve the underlying cause of the U1332 code.