Sorry but it sounds like you have been at the wrong shop. I would recomend going to a good dealer in your area to have this diag. I would not
get into buying a scan tool at this time . Help with you car can be made easier if codes are known ,at best they are only part of the diag. process.
your problem may be found with using basic tools & knowledge. If you could give us some codes or other symptoms, I am sure you will get help with your car.
Guyopel
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