U1385 – Invalid Data Received from the Instrument Panel Cluster (IPC).

The ODBII code U1385 indicates that the vehicle’s control module has received invalid or corrupted data from the Instrument Panel Cluster (IPC), which may affect the accuracy of the information displayed on the dashboard.

The severity of ODBII code U1385 is generally considered moderate.

Common Causes For: U1384 U1384: “Module Communication Failure”

• Faulty Instrument Panel Cluster (IPC)
• Poor or damaged wiring/connectors
• Corrupted software or firmware in the IPC
• Faulty communication between the IPC and the Engine Control Module (ECM)
• Low battery voltage or electrical issues
• Faulty sensors sending incorrect data
• Grounding issues in the vehicle’s electrical system

Common misdiagnosis for U1385 Invalid Data Received from the Instrument Panel Cluster (IPC)”.

• Faulty Instrument Panel Cluster (IPC)
• Wiring issues or shorts in the communication lines
• Faulty Engine Control Module (ECM)
• Corrupted software or firmware in the IPC or ECM
• Bad ground connections
• Faulty sensors sending incorrect data
• Issues with the vehicle’s CAN bus system
• Battery or power supply problems affecting the IPC
• Incorrectly installed aftermarket accessories or modifications
• Faulty diagnostic tools or improper scanning techniques

Common Troubleshooting Steps

The OBD-II code U1385 indicates that the Engine Control Module (ECM) has received invalid data from the Instrument Panel Cluster (IPC). This can be caused by various issues, including wiring problems, faulty components, or communication errors. Here are some common troubleshooting steps to diagnose and resolve the issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues.
• Inspect Wiring and Connectors:
• Visually inspect the wiring and connectors between the IPC and the ECM for any signs of damage, corrosion, or loose connections.
• Ensure that all connectors are securely plugged in and that there are no bent pins.
• Check for Ground Issues:
• Verify that the IPC and ECM have a good ground connection. Poor grounding can lead to communication issues.
• Use a multimeter to check for continuity between the ground points and the battery ground.
• Test the IPC:
• If possible, perform a self-test on the IPC to see if it is functioning correctly. Some vehicles have a built-in diagnostic mode for the IPC.
• Check for any signs of malfunction, such as erratic gauge readings or warning lights.
• Inspect the ECM:
• Check the ECM for any signs of damage or corrosion. Ensure that it is securely mounted and that all connections are tight.
• If the ECM has been recently replaced, ensure that it is compatible with the vehicle.
• Check for Communication Issues:
• Use a scan tool to monitor the data being sent between the IPC and ECM. Look for any discrepancies or unusual readings.
• If you have access to a professional-grade scan tool, you can perform a network test to check for communication errors.
• Look for Software Updates:
• Check if there are any software updates available for the IPC or ECM. Sometimes, manufacturers release updates to fix known issues.
• Perform a Hard Reset:
• Disconnect the vehicle’s battery for a few minutes to reset the ECM and IPC. Reconnect the battery and see if the code reappears.
• Consult Technical Service Bulletins (TSBs):
• Look for any TSBs related to the U1385 code for your specific make and model. Manufacturers may have issued guidance on common issues and fixes.
• 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 issues. By following these troubleshooting steps, you can systematically identify and resolve the cause of the U1385 code.