99 Honda accord 4 door automatic blinking d4 light that doesn't go off?

I recently took my car in to Meineke for some starter issues and he checked all my connections and it was doing fine, but I do need a new starter apparently. But I'm worried he bumped something when checking the connections. Now when I start the D4 light is blinking and doesn't stop. Is it my transmission or a connection of some sort? When I try to drive it's like it barely accelerates.

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