Audi Q2 Fuel Pump Problems: Warning Signs & Fixes

I had a very similar situation with my 2017 Audi Q3 last year. With some experience working on cars, I recognized the symptoms you described, especially the rough running and starting issues. Initially, I thought it was a complete fuel pump failure, but after taking it to my trusted workshop, they discovered it was actually just a faulty wiring connection to the fuel pump. The entire fuel system was functioning properly, but the inconsistent electrical connection was causing problems with the gasoline delivery. The repair involved fixing the cable connection at the fuel pump assembly. Total cost was 95 Euro and took about an hour to complete. The car performance returned to normal immediately after the fix. Before jumping to conclusions about needing a new fuel pump, you should have them check: Electrical connections to the fuel pump, Fuel pressure readings, Fuel injector function, Fuel filter condition To help diagnose this better, could you share: Current mileage on your Q2? When did these symptoms first appear? Have you noticed any correlation with weather conditions? Are there any other warning lights besides the check engine light?

Thanks for your input. Since my last service at 95000 KM, these engine stalling issues started appearing. The automotive diagnosis pointed to several potential problems, but the fuel pump symptoms match exactly what you described about inconsistent gasoline delivery. The mechanic ran tests showing abnormal fuel pressure readings, which strongly suggests a pump failure rather than just wiring. The stalling happens regardless of weather conditions and gets worse when the engine is warm. Besides the check engine light, no other warning indicators are showing up on the dashboard. Going to have them do a complete fuel system check before replacing any parts. Current mileage is 98542 KM and it looks like the original fuel pump was never replaced, so maybe its just worn out.

Based on those mileage numbers and symptoms, I am even more convinced your issue could be similar to what I experienced, but possibly more severe. After dealing with my Q3s fuel system issues, I learned that these pumps typically start showing wear around 90000-100000 KM. The abnormal fuel pressure readings combined with engine stalling when warm are classic signs of a failing fuel pump, much worse than my wiring issue was. These symptoms often happen when the pump cant maintain consistent pressure under heat stress. Since my repair last year, I have learned that auto repair shops should also check: High pressure fuel sensor function, Fuel rail pressure, Fuel quality and contamination levels A complete fuel pump replacement on these models typically costs between 400-600 Euro for parts and labor. While expensive, its better than risking further engine damage from improper fuel delivery. The key is getting an accurate automotive diagnosis first. Make sure they test both low and high pressure sides of the fuel system. My mechanic showed me that fuel injector performance can mask pump issues, so its worth having the entire fuel delivery system checked. Would definitely recommend not delaying the repair if tests confirm a pump failure, as continuing to drive with these symptoms could lead to more expensive engine problems.

Thanks for sharing those details. That mileage and the symptoms match what others have reported before major fuel pump issues. My instinct about wiring being the cause was wrong, the pressure test results make it pretty clear the pump itself is failing. The car mechanics quoted me 550 Euro for a complete fuel pump assembly replacement. While that is not cheap, the consistent engine stalling and rough running is getting worse and I do not want to risk damaging other components by waiting too long. I will have them do the full fuel system inspection you suggested, checking both the fuel injector performance and rail pressure. Makes sense to verify everything while they have the system open. The car performance has dropped so much lately that I can not put this repair off much longer. Going to schedule the work for next week. Will update once I know if the pump replacement fixed all these issues. Really hoping this resolves the engine stalling problems I have been dealing with.