2017 Audi A3: check engine light

Filed Dec 7, 2025 · Engine, Fuel system · CO · 1 injury

In August 2025, my 2017 Audi A3 (VIN [XXX] ) experienced repeated stalling, strong gasoline odors inside the cabin, and a check engine light immediately after Audi completed recall-related service. The safety issue was later confirmed by the dealership to be caused by a failed suction jet pump (the federal safety agency Recall 24V110), which allowed fuel to enter the EVAP system and leak into the rear seat area and cabin. The leak was so severe that the rear seat and flooring had to be replaced due to fuel saturation. Before the problem was properly identified, I was repeatedly told the issue was “just the gas cap,” despite reporting fuel smell, rapid fuel loss after filling the tank, and the check engine light. During this time, I unknowingly drove a vehicle with a significant fire hazard. The cabin fumes caused physical symptoms and unsafe driving conditions. I was not notified of this recall at the time I purchased the vehicle in March 2022, nor was I notified of a second recall affecting the passenger occupant detection system (69BY), despite having purchased a one-year maintenance warranty. I only became aware of the recalls after experiencing the hazardous symptoms described above. The problem was confirmed and reproduced by the Audi dealership. Fuel odor, fuel loss, and warning lights first appeared within 24 hours after the initial service visit, and the safety defect was later linked to the recall-related component failure. This defect presented a serious risk of fire and exposure to gasoline fumes to both myself and other road users. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 17, 2023 · Acceleration, Electrical · TX

While driving on highway 59 my vehicle began to jerk. I tried to accelerate and the vehicle would ramp but not move fast. My check engine light came on as well as the error code “transmission malfunction you continue to drive until engine is off.” After getting out of Houston, Texas rush hour traffic, I had my vehicle towed to a mechanic. The mechanic ran several tests and checked the engine. Upon diagnosing the vehicle, the scan tools gave a myriad of fault code relating to electrical valve faults. All of which clear when driving the vehicle again. The mechanic informed me the transmission was not the issue but the mechatronic system had failed due to a faulty part. The mechanic said the issue could be repaired but would likely occur again as Audi as a history of faulty mechatronic systems. The mechanic called an Audi dealership who stated Audi’s mechatronic control unite has not yet resolved the root cause failure at factory level, meaning all replacements and repair kit components still have the underlying defects that will cause malfunction, usually outside the short one-year manufacturer warranty. I believe Audi manufacturer knows their cars still have a defective part hence why an extended warranty on the mechatronic system is offered. Also, Audi vehicles made in 2016 were recalled due to a defective mechatronic system. My vehicle was made in early 2017. I called the Audi dealership to make them aware of the safety and they ignored me, and tried to sell me another vehicle. This is my second safety issue with Audi vehicles, the first being an expulsion safety issue. There is no way I am purchasing another Audi.

Filed Oct 12, 2022 · Fuel system, Transmission · CA

2017 Audi A3 Etron Sportsback- Engine light turned on at 50k, when scanned for errors no codes. Then around 55k miles started to stall when slowing down or at a full stop. The car must be turned off then immediately go into drive. Felt very dangerous when driving in high traffic areas and areas with many stop lights/signs. Car error say Transmission Malfunction first then says something about Limited Power. We had changed ATF and filter, still had issues. Then it started to not allow to go into reverse. Issues were intermittently happening then became more constant. Finally towed to Audi dealer they are not 100% but they say a new transmission is needed. After seeing complaints of similar situation I think this should be a recall on the transmission for these cars.

Filed Jun 20, 2022 · Fuel system · TX

On Tuesday, June 7, 2022 my vehicle began having a hard time accelerating, then my vehicle started leaking out gas from the back of the vehicle located in front of the rear passenger tire. I then took the vehicle to Audi West Houston to have a diagnosis. After a day and a half, Audi misdiagnosed my vehicle with ethanal composition too high and recommended that the gas tank be drain. I then took my car to an independent mechanic who replaced the fuel pump. On the way to the independent mechanic for a second opinion, the check engine light surface. I then stopped at the gas station to put gas in the vehicle, but the vehicle would not take fuel even though After the fuel pump repair, the car was still misfiring and gas was still leaking from the rear of the vehicle and gas fumes would be smelled from inside the car. The charcoal canister of the vehicle was changed with OEM parts. The vehicle's sending units were pulled and the fuel level was tested. The vehicle's Leak Defection Pump was then inspected for the fuel intrusion and were not obstructed. The vehicle again began leaking fuel. The purge and vent valves of the vehicle were working properly and the vent filter was wet with fuel. The fuel was being pushed into the charcoal canister from an internal valving issue inside the fuel tank. The independent mechanic then called an authorized Audi dealership who acknowledged similar problems in Audi vehicles. The authorized Audi dealership deemed the car unsafe to drive and suggested that the independent mechanic park the vehicle outside of the mechanic shop because a simply spark could cause the vehicle to easily caught on fire. Audi also acknowledged that there are no available parts for the car as all of them are on indefinitely on backorder. The car is not only an emission issue but also a safety issue with not feasible solution. Furthermore, I live in Texas during an unpredictable drought, even the weather could cause the vehicle to spontaneously combust in flames.

Filed Jan 5, 2022 · Engine · MD

This is the second failed (1/1/2022) camshaft position sensor on separate cylinder (#4), p/n 06E-103-697-AE. First one failed 3/05/2021. There are 8 of these adjusters on the particular engine. I have asked the dealer to retain the part. Safety is related to engine operation...malfunction indicator light is lit and vehicle/engine fails emissions inspection. Problem has been confirmed by dealer, Audi Silver Spring, MD. Vehicle is being repaired by Audi dealer at my cost. Second time $500. Yes, engine malfunction indicator light is on and vehicle fails emission inspection.

Filed Mar 12, 2021 · Engine, Fuel system · 47,000 miles · FL

2017 audi a3 sedan- with around 47,000 miles -stalled out in drive thru and at a red light intersection. Twice. Almost got in 2 accidents while driving once on the highway and once on a city road. Engine light on dash was blinking. Code reader initially was reading p0300, p0301 and p0302 .. Multiple cylinder misfires. Towed car to audi, and they did complete maintenance service. Ran codes and now all of the sudden it need a new transmission and the code is p0172 bank 1 system too rich. I noticed there was a recall for the the engine control unit (ecu) software and which can affect air / fuel mixture which makes me think that this recall was probably the cause, because po172 code can be due to the air/ fuel mixture getting too far from factory specs. My car has been at the dealership for 6 weeks, the transmission was finally replaced by audi but they are still saying that I need a new fuel canister (there was a recall for this in 2016, and my car was manufactured in 2016 but is a 2017 model) ? I have seen several other 2017 audi a3 sedan owner complaints having this issue with very similar problem on this website and other websites. I was under warranty until 1/25/2021, but I live 2 hours away and I was under quarantine so booked appointment locally (I think on 1/22/2021 with volkswagen but scheduling was a week out and on appointment date their entire service department was out because of covid outbreak by that time it was too late even though I have a time and date stamped video of the car having issues.

Filed Feb 11, 2020 · Engine, Fuel system · 72,000 miles · NJ

My car after starting (with engine either cool or warm) will stall at times when I'm going2-3 MPH. I have stalled at intersections. I go to put my foot on the gas and the car will sputter and stall. It will then restart with a little difficulty though starts back up. There are no icons that illuminate on the dashboard with any problem. There are no check engine lights or battery lights that are going off.

Filed Dec 20, 2019 · Engine, Fuel system · NJ

When driving off after starting the vehicle, the car starts jerking and 'knocking' and stalls/turns off. This happens almost everyday as I reverse out of my drive way and drive forward. Extremely unsafe! Does not show check engine light or any other lights.