I received this list from the dealership detailing the issues with my car. Can someone help me understand what actions I should take or offer some guidance on how to address these problems? Any information or advice would be greatly appreciated.
There are multiple codes for unrelated systems, which likely indicates a broken or shorted wire somewhere.
That ECU internal checksum error could be serious and costly. If the issue is within the ECU itself, it could be causing all the error codes.
The checksum code indicates that the module has detected corruption. It seems like you might have a poor electrical connection damaging components, or it could be that the module itself is faulty.
Purchase a scan tool (the ELM927 is $10) and read the codes yourself. Ignore any pending codes. Clear the codes and see which ones reappear immediately.
Your biggest problem is in the ECU Internal Checksum Error. Use an OBD-II scanner to pull any diagnostic trouble codes related to the ECU. This can give you more specific information about the error.