U1443 – Invalid Data Received from Vehicle Dynamics Control Module.

The ODBII code U1443 indicates that the vehicle’s control module has received invalid or erroneous data from the Vehicle Dynamics Control Module, which may affect the vehicle’s stability and handling systems.

The severity of ODBII code U1443 is generally considered moderate.

Common Causes For: U1442 Lost Communication with Hybrid Powertrain Control Module (HPCM) A.

• Faulty Vehicle Dynamics Control Module (VDCM)
• Poor or damaged wiring/connectors between VDCM and the ECU
• Corrupted or incorrect software in the VDCM
• Malfunctioning sensors related to vehicle dynamics (e.g., wheel speed sensors)
• Communication issues between modules (CAN bus problems)
• Low battery voltage or electrical issues
• Faulty ECU (Engine Control Unit) or other related control modules

Common misdiagnosis for U1443 Invalid Data Received from Vehicle Dynamics Control Module.

• Faulty ABS module
• Defective wheel speed sensors
• Malfunctioning traction control system
• Issues with the vehicle’s wiring harness
• Problems with the engine control module (ECM)
• Incorrectly calibrated or faulty steering angle sensor
• Faulty brake control module
• Issues with the powertrain control module (PCM)

Common Troubleshooting Steps

The OBD-II code U1443 indicates that the Engine Control Module (ECM) has received invalid data from the Vehicle Dynamics Control Module (VDCM). This can be related to issues with communication between modules, sensor malfunctions, or wiring problems. 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 ECM and the VDCM. Look for signs of damage, corrosion, loose connections, or frayed wires.
• Check for Ground Issues:
• Ensure that all ground connections related to the ECM and VDCM are secure and free of corrosion. Poor grounding can lead to communication issues.
• Test the Vehicle Dynamics Control Module:
• If possible, test the VDCM to ensure it is functioning correctly. This may involve checking its power supply, ground, and communication signals.
• Inspect Related Sensors:
• Check any sensors that provide data to the VDCM, such as wheel speed sensors, steering angle sensors, or yaw rate sensors. Ensure they are functioning properly and that their wiring is intact.
• Check for Software Updates:
• Verify if there are any software updates available for the ECM or VDCM. Sometimes, manufacturers release updates to fix known issues.
• Clear Codes and Test Drive:
• After performing any repairs or inspections, clear the trouble codes and take the vehicle for a test drive to see if the code reappears.
• Perform a Network Test:
• If the issue persists, consider performing a network test to check for communication issues between the various modules in the vehicle.
• Consult Technical Service Bulletins (TSBs):
• Look for any TSBs related to the U1443 code for your specific vehicle make and model. Manufacturers may have documented common issues and fixes.
• Professional Diagnosis:
• If you are unable to resolve the issue, it may be necessary to take the vehicle to a qualified technician or dealership for further diagnosis. They may have specialized tools and knowledge to address complex communication issues. By following these steps, you can systematically identify and address the root cause of the U1443 code.