U1422 – Invalid Data Received from Vehicle Dynamics Control Module.

The ODBII code U1422 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 U1422 is generally considered moderate.

Common Causes For: U1421 Invalid Data Received from Vehicle Dynamics Control Module.

• Faulty Vehicle Dynamics Control Module (VDCM)
• Corrupted or damaged wiring harness
• Poor electrical connections or corroded connectors
• Faulty sensors related to vehicle dynamics
• Software issues or bugs in the VDCM
• Communication issues between modules
• Low battery voltage or power supply issues
• Faulty or malfunctioning ABS module

Common misdiagnosis for U1422 Invalid Data Received from Vehicle Dynamics Control Module.

• Faulty ABS module
• Defective wheel speed sensors
• Malfunctioning traction control system
• Issues with the powertrain control module (PCM)
• Wiring or connector problems
• Faulty vehicle dynamics control module (VDCM)
• Incorrect tire sizes or pressures
• Software or calibration issues in the control modules

Common Troubleshooting Steps

The OBD-II code U1422 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 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:
• Ensure that the ground connections for both the ECM and VDCM are secure and free of corrosion.
• A poor ground can lead to communication issues between modules.
• Test the Vehicle Dynamics Control Module:
• If possible, test the VDCM to ensure it is functioning correctly. This may involve using a scan tool to check for live data and see if the module is responding as expected.
• If the VDCM is faulty, it may need to be repaired or replaced.
• Inspect Related Sensors:
• Check any sensors that provide data to the VDCM, such as wheel speed sensors, yaw rate sensors, or steering angle sensors. Ensure they are functioning correctly and that their wiring is intact.
• Look for any signs of physical damage or wear.
• Check for Software Updates:
• Sometimes, manufacturers release software updates for the ECM or VDCM that can resolve communication issues. Check with the manufacturer or a dealership to see if any updates are available.
• Clear Codes and Test Drive:
• After performing any repairs or inspections, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Perform a Network Test:
• If the issue persists, consider performing a network test to check for communication issues between modules. This may require specialized diagnostic equipment.
• Consult Technical Service Bulletins (TSBs):
• Check for any TSBs related to the U1422 code for your specific vehicle make and model. Manufacturers may have documented common issues and solutions.
• Seek Professional Help:
• If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or dealership with experience in diagnosing and repairing communication issues in vehicle networks. By following these steps, you should be able to identify the root cause of the U1422 code and take appropriate action to resolve it.