diagnostic

I have a 2003 corolla LE, 220k miles (very well maintained). Since late summer/fall 2016, I noticed my corolla was starting more slowly. I replaced the battery in December. Two weeks later it was dead again. Fast forward to March, I went on a trip and left my car for a week. I came back home and...

Hi. A week ago my car intermittently alerted me of a diagnostic problem when I turned on the ignition. The alert would fade away when I drive off. Now it stays on. I tried to connect my OBDII reader to find codes to research but it just comes back with 0s. Does this model not comply with...