U1622 – Control Module Configuration Incompatibility

The ODBII code U1622 indicates a control module configuration incompatibility, meaning that there is a mismatch or conflict in the configuration settings between different control modules in the vehicle’s network.

The severity of ODBII code U1622 is moderate.

Common Causes For: U1620 U1620: “Data Bus Communication Fault Detected”

• Mismatched control modules
• Incorrect software version
• Faulty control module
• Corrupted configuration data
• Recent repairs or replacements of modules
• Communication issues between modules
• Improperly programmed or calibrated module
• Electrical issues (wiring or connectors)

Common misdiagnosis for U1622 U1622: Control Module Configuration Incompatibility

• Faulty control module
• Wiring issues
• Corrupted software/firmware
• Incorrectly programmed module
• Communication errors between modules
• Faulty sensors or actuators
• Battery or power supply issues
• Grounding problems

Common Troubleshooting Steps

The OBD-II code U1622 indicates a “Control Module Configuration Incompatibility.” This code typically arises when there is a communication issue between control modules in a vehicle, often due to mismatched configurations or software versions. Here are some common troubleshooting steps to address this issue:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, U1622 may be accompanied by other codes that can provide more context for the issue.
• Inspect Wiring and Connectors: Examine the wiring and connectors associated with the control modules. Look for signs of damage, corrosion, or loose connections that could affect communication.
• Verify Module Compatibility: Ensure that all control modules in the vehicle are compatible with each other. If a module has been replaced, it may need to be programmed or configured to match the vehicle’s specifications.
• Check for Software Updates: Verify if there are any software updates available for the control modules. Manufacturers often release updates to fix bugs or improve compatibility.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the control modules. Reconnect the battery and see if the code reappears.
• Reprogram or Reconfigure Modules: If a control module has been replaced, it may need to be reprogrammed or configured using a manufacturer-specific scan tool. Follow the manufacturer’s procedures for programming.
• Inspect for Ground Issues: Ensure that all control modules have a good ground connection. Poor grounding can lead to communication issues.
• Check for Intermittent Issues: Sometimes, the issue may be intermittent. Monitor the vehicle for any patterns or specific conditions under which the code appears.
• Consult Technical Service Bulletins (TSBs): Check for any TSBs related to the U1622 code for your specific vehicle make and model. Manufacturers may have documented solutions for known issues.
• Seek Professional Help: If the issue persists after performing the above steps, consider consulting a professional mechanic or dealership. They may have access to specialized diagnostic tools and resources to resolve the issue. By following these steps, you can systematically diagnose and potentially resolve the U1622 code.