2020 Volkswagen Passat Other Problems

Your 2020 Passat's Check Engine Light keeps coming back with a secondary air injection system fault code (P0491). You've had the air injection pump replaced, but the light returned within 24 hours. Multiple repair shops have given conflicting diagnoses—one says the pump was fine and blamed a stuck valve instead, while another suggested the problem might be in the cylinder head itself. The underlying cause remains unresolved despite multiple repair attempts.

Your car's engine revs up and makes noise like it's trying to accelerate, but the vehicle won't actually speed up. You've taken it to the dealership multiple times, but they haven't identified the cause. This could involve a transmission issue, fuel system problem, or engine sensor malfunction that needs further diagnostic testing.

Your park assist system is not working, and you're experiencing a loss of engine power when turning left or right. This could indicate an electrical or sensor issue affecting both the parking assistance feature and engine performance during turns. A diagnostic scan of your engine and electrical systems would be needed to identify the root cause.

Your 2020 Passat came with CarNet connected services included at purchase, and it worked fine until 2024 when the connection stopped working. After taking it to the dealer for diagnosis, Volkswagen informed them that your model year is no longer eligible for CarNet service and can no longer use this feature. You're concerned that Volkswagen is removing a service you paid for at the time of purchase.