2025 Audi Q5

Check engine light is on almost constantly on my car. It might turn off and stay that way for a couple of days, but always comes on again. Dealership had made two attempts to "fix" it by just clearing the faults. However, according to the service department the reason why check engine light came on was "faults for loss of communication to powertrain electronics and brake electronics" which i think is a real safety concern. After my last trip to the dealership the check engine light came on after just two days of normal driving. There was also a situation when i was unable to shift to park with the risk of rolling along with some other error messages on the dash. I was unable to lock the vehicle because of that and of course there was a risk of it rolling.

After the automatic start/stop system engages, the engine stalls and completely shuts off shortly after the vehicle begins moving again. This occurs after the vehicle restarts and travels only a few feet. When the stall happens, the vehicle loses power and the engine stops functioning while the car is in traffic. This has occurred two separate times: once on a busy highway and once while entering a roundabout. Both incidents created a dangerous situation where the vehicle could not maintain power in active traffic and could have resulted in a crash. A yellow emissions warning light also appeared on the dashboard. The dealer indicated that an intermittent oil pressure sensor code was present but no parts were replaced and no corrective action was taken. The dealer reset the system and stated they could not reproduce the problem. The vehicle is now being returned to me without repair despite the safety risk. An engine stall immediately after the start/stop system restarts the vehicle creates a serious hazard because the vehicle can lose power in the middle of traffic. I believe this issue may be related to the automatic start/stop system or an oil pressure sensor fault affecting engine operation.

The car floods with excess fuel after idling for a short period of time resulting in multiple misfires and violent vibration. The car will not restart and will need to be towed. In traffic jams, the car can fail stranding motorists and creating a very unsafe situation. The problem has been verified by the dealership. Apparently, it is a known issue with the new Audi Q5 and they do not have a viable solution. They said to put the car in neutral and rev the engine to try and burn excess fuel. However, once the misfires start, it’s probably too late. I have pictures of the warning lights and the service reports. The car is 2 weeks old and has been back to the shop twice ( towed once) for a total of 5 days.