I got on my car and when it started I could feel the pull but the error service minder-belt came on then went away. I got to work then left again after 10 min when I went to start the car it wouldn't start and the console was shutting down to save the battery. When it finally started the transmission error -service now came on. I took it to auto hobby they checked the battery, all was good there 14.4v. The did a diagnostic for codes and transmission came up. Any ideas?