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[Griffin Clayton]

I have a 1999 a4 1.8t and recently changed the battery, ever since I put the new battery in, ive had issues with the throttle, I believe its an issue with the computer. I bought a device that plugs in to read the computer but it keeps getting errors. the reader works on my sisters 2000 a4 1.8t. has anyone had any similar issues or advice on it?

[Autohau5]

What are the issues? The throttle body may need to be aligned.