One problem related to warning has been reported for the 2020 Audi Q3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Audi Q3 based on all problems reported for the 2020 Q3.
On January 16, 2020, I was driving on a local street and started slowing down for a stop sign. I had forgotten to turn off the auto start/stop switch as is my usual practice, so I deactivated it before stopping. When I hit the switch, I got an error message telling me the cruise control was no longer available, the engine warning light came on, and the motor started shuddering. As I tried to pull away from the stop sign, the car wouldn't accelerate more than 7 mph. Towed to dealer. They are trying to track the fault. I have also had problems with the lane keeping detection system since I bought the car in August, 2020. The system is supposed to come on automatically when the vehicle is started. Half the time it doesn't come on when started; other times, when making multiple stops during a day's driving, it comes on at random times. Some days it never comes on. Other days it comes on each time. Dealer can't find fault. Turning it on manually doesn't guarantee that it'll turn on the next time you start the vehicle.