Audi A6 misfire problems

Filed Mar 29, 2026 · Fuel system · NC

There is a recall out for “2016 Audi A6 vehicles” the recalls are “fuel system rail” as well as “coolant pump”. Both recalls are vin specific and what I find to be devastating is that both recall risk pertains to possible fire! I have the exact issues with my vehicle I even have the epc light coming on and the code is “fuel rail system” I also have an ongoing issue with my coolant system. I have documentation that I’ve paid out of pocket to take care of these issues, however being that there is no current open recalls under my vin number I do not believe mechanics know exactly what to do to fix the issues. The vehicle is misfiring, shutting off and the EPC code is stating “fuel system rail” along with the coolant leaking. I have a [XXX] daughter and to be such an expensive vehicle, I thought I would feel safe and valued. I’ve worked as a service BDC manager for years and at other dealerships when a situation like this would occur, we still wanted them to bring the vehicle into the dealership and if it was in fact relatable to the recall we would take care of it, regardless to it being “vin specific”. There is a such thing as “silent recall”. I really hope that you all can take this as an emergency case and help with such terrible situation. Thank you so much. I can be reached at [XXX] my name is [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 30, 2025 · Fuel system · NY

I own a 2016 Audi A6 3.0T. After filling the fuel tank completely, the vehicle only traveled approximately 190–200 miles before the fuel gauge indicated empty. This represents a sudden and significant loss of fuel range compared to normal operation. There are no warning lights, check engine lights, fuel smells, visible leaks, rough idle, or abnormal noises. The vehicle operates normally otherwise. The issue appears to involve excessive fuel consumption or incorrect fuel management without any driver warning. This condition poses a potential safety risk because the vehicle may unexpectedly run out of fuel while driving, which could result in loss of power in traffic or on highways, increasing the risk of an accident. The issue has been observed repeatedly after refueling. At the time of this report, the vehicle has not yet been inspected by a dealer or independent repair facility, but diagnostic evaluation is planned. Based on owner research and symptoms, the issue may be related to a fuel system, engine management, or emissions-related component malfunction that does not trigger a warning indicator. No prior warning messages or lamps were displayed before or during the occurrence.

Filed Nov 19, 2020 · Electrical, Engine · TX

My car was stationary and oil is leaking from the engine my fuel system is messing up. Also I'm having electrical problems cylinder 1 misfire open ground or short to ground circuit .

Filed Sep 23, 2019 · Engine · 770 miles · KS

This issue happens when the car is stopped and the auto stop/start feature has stopped the engine. Most commonly at a stop light at a major city intersection, where the lights are longer. When the system attempts to restart the engine, it rough idles and then the drive system shuts down the engine, causing you too lose all power. This leaves you stranded, and risks causing someone to rear-end your vehicle if the light changes. Putting the car in park, turning off the ignition, and then turning the ignition back on resumes engine function. This has happened multiple times. So far the service center has been unable to identify the root cause.

Filed Sep 4, 2018 · Engine · 10,000 miles · TN

When operating at low speeds the vehicle will sometimes unexpected lurch forward or backwards depending on if the transmission is in forward or reverse. I have automatic transmission. This often happens in maneuvers such as parking or backing into or out of a garage parking place. It happens when the transmission is in forward or reverse and typically when the driver's foot is on the brake and you are slowly easing into or out of a place like a parking spot or garage. This concerns me from a safety perspective since a prime time when this happens might be when I am pulling into or out of my garage at the beginning or end of a travel. My concern is that a child or adult may be crossing in front of or behind the car before it starts moving and then the car unexpected lurches forward or back and hits the pedestrian. It is almost as if the engine misfires and the engine and car "jumps" after the misfire. I have reported this to the dealership service department multiple times and they can not "reproduce" the incident. However, one of the service department personnel has the same model vehicle as me and says he knows what I am talking about because he has experienced it as well. It has happened on multiple occasions though I can not tell you any exact dates.

Filed Oct 10, 2012 · Electrical, Engine · 70,290 miles · NJ

The audi was stopped at a stop light when the RPM meter started to drop revs suddenly. Once the car was in motion the engine felt rough. The car was driven 3 miles with no further incidence and was parked for the night. The next day when the car was started in the morning the check engine light came on and the engine started to get very sluggish and shuddering. The car was immediately stopped and the diagnostic codes were pulled. The codes showed multiple cylinder misfires with specific misfires in cylinder 2 and three. The car was towed to an audi dealer where this was confirmed. The dealership mentioned that there was a voluntary recall for exactly this issue. This is a safety issue.

Filed Oct 19, 2011 · Electrical, Engine · PA

My check engine light is marking misfire but I have gotten a complete tune-up, changed all 6 coils on the engine changed all the spark plugs, I've done everything possible and changed everything I can that has to do with the engine all brand new and nothing has worked and its still saying misfire...I've googled this problem for audi's and there were so many people complaining about the same thing... Also, I am having a problem with the electrical system as well one day my windows work the next it doesn't sometimes my lights will work and sometimes it doesn't, sometimes my radio will work some times it doesn't, the information on my dash sometimes doesn't light up and I can't see anything at night time, I have constantly been to the mechanics trying to figure out what's going on but we can't find the problem, I've spent so much money on this car trying to fix the problems but its really making it hard for me to keep spending money on my car and not being able to figure out what's wrong with it. This is very dangerous because if I'm driving at night time and my lights end up not working I can cause a very big accident I am very very concerned about these defects, my safety and others safety and would really appreciate if you can please investigate this problem because its happened to so many people. I also think something is wrong with the fuel system I'll put $60 in gas and two days later it'll almost mark empty I really don't understand how that is possible but if there's an answer I would really want to know. Thank you so much and I really appreciate your time.

Filed May 22, 2011 · Electrical · 85,300 miles · MD · fire

2003 a6 quattro avant 3.0 car ran fine driving to work. When leaving at end of day, started car and it ran very rough I decided to reverse back into parking space and at that point noted smoke coming from under hood (car had run for approximately 20 seconds). Turned off engine, opened hood, and found the drivers side rear coil pack burning. Extinguished flame using a baseball cap to smother it out. Coil pack continued to smoke and reignite due to burning inside coil pack. Jammed screwdriver into pack to root out flame. Had car towed to audi dealer - awaiting repair. There is an active recall campaign for bad coil packs (28f2 / j1) - recall states check engine light may come on and car will run rough, further recommends returing vehicle to dealer at that time. There is apparently two ways the pack can fail - a fault on the high voltage end just bypasses the spark to the engine block causing a misfire. A fault at the low voltage end results in a short and most likely a fire. This potential for fire is understated by audi and shoud be clearly identified in the recall campaign to ensure the right urgency is placed on this issue. The fact is, I was able to react and extiguish the fire, had this occured in other circumstances the car would most likely have completely burned.

Filed Apr 17, 2011 · Engine · 72,500 miles · NY

Catalytic converters (2 front) need to be replaced. And the check engine light is on steady, indicates engine misfire.

Filed Feb 17, 2011 · Engine · 99,370 miles · CT

Tl*the contact owns a 2002 audi a6. While the vehicle was being inspected for emissions 01/10/2011, the contact was informed that the engine was misfiring due to a defective coil. The failure LED to damage to the catalytic converter which needed to be replaced along with the coil. The local authorized dealer replaced the coil. The contact called the manufacturer who offered no assistance. The converter was not replaced. The failure mileage was 99,370 and the current mileage was 99,410.