OBD2 code C0626 indicates a problem with the enable circuit for the keyless entry system. This could be due to issues with the keyless entry module, wiring harness, keyless entry receiver, or a faulty key fob.

To diagnose the exact cause of the issue, you will need to perform a thorough inspection of the keyless entry system components. Check for any visible damage to the wiring harness and ensure all connections are secure. Test the key fob to see if it is transmitting signals properly and check if the keyless entry module is receiving these signals.

If you are not familiar with automotive electrical systems, it is recommended to consult a professional mechanic to accurately diagnose and repair the problem. They will have the tools and expertise needed to pinpoint the issue and conduct any necessary repairs or replacements.