If you are still seeing the error, it might be a checksum issue. Some editors fail to update the "save signature," making the game think the file is corrupted regardless of the heat value. In that case, use a

I can provide specific instructions for the exact tool you are using!

If the Save Editor continues to fail, consider these alternatives:

If you use addon cars or modified NFS_Carbon.exe , the heat value memory offset may shift. Try editing on a vanilla copy of the game first.