Andreiash

Hi all, My superb mk3 goes into limp mode when it reaches 80-85 degrees from cold. Initially, after restarting the car the issue would go away and not have any problems after. Took the car to the shop, put the tester on it, it wasn’t showing a specific error, but multiple errors for multiple sections. After a few days, the problem still persists and even escalated to rattling when i restart it(sometimes taking a few sec to do so), rattling when i push the throttle at 40-60 mph, and even turning off while driving. Do you guys have any ideas what can cause this. Mechanic said it’s a short-circuit, but i have my doubts. Thanks in advance.