It occurs to me that much of the bullshit that we have to put up with in this world is due to the same problem, a few ignoranuses who do stupid things and necessitate the passage of laws that restrict everyone's behavior. Use the time wisely, count the number of things that you can't identify. Even if your neighbor is a mechanic, it doesn't necessarily follow that he is a competent one. Be sure that you know what you are doing before you start tearing into things and replacing parts. You can waste a lot of time and money.
Cars are individuals.
If you get a Herbie, be nice to him and he will be your friend forever. If you get a Christine, park her on the front lawn with a FOR SALE sign in the windshield and let her curse someone else's life - before she ends yours. Many people in the industry will automatically assume that the computer is the cause of some problem. He's either an idiot, or a bandit, neither trait is desirable in your automotive caregiver. Get a second opinion.