Drive-by-wire warning light came on and acceleration was awful. Was able to drive the car to dealer next day. Dealer found fault code and had to remove manifold to repair issue with software/computer system.
Intake manifold position potentiometer sensor LH had to be replaced which was causing the air to fuel ratio to throw a check engine light for engine running too lean. TSB.
Coolant leak required water pump and belt replacement. Fuel system tune up and throttle service
Carbon build up on intake valves
Carbon build up on intake valves
Leaking antifreeze, diagnose as hose. Hose was replaced but still leaked.
needed 2nd trip to dealer for anti-freeze cover by thermostat area on water pump
P0420 - Catalyst System Efficiency Below Threshold Bank 1. The dealership tried to do a test on the system and they couldn't complete it. The check engine light was reset and since the light hasn't came back on I haven't taken it back for more tests.
Engine light came on with misfire on cylinder 1 took to audi and diagnosed sporadic misfire, audi replaced coil and test drove, no further light. Have been using additive to avert carbon build up as part of routine maintenance
Car was mis-firing, required injector cleaning which took 3 days
Fuel Rail Pressure code. Car did not start immediately and then stalled on the way to dealer. Tank was 1/8 full.
Dealer claimed car should not be driven at 1/4 full or less.
Stalling problem continued after last repair attempt, vehicle was towed back to the dealer. Replaced high-pressure fuel pump. Stalling continued.
On fourth attempt, finally found the problem, a bad sender in one of the sides of the fuel tank.
Q7 in the shop from June through November for rattling noise from engine, major electrical problems, and a water leak. The day after I got it back the CEL came on again. In shop many times before, average of 30+ days each time. Got rid of it.
O2 Sensor, Engine Computer, Repair still in progress
Coolant warning light came on. Discovered coolant levels were well below minimum. Per dealer, coolant system leak, replaced coolant tank.
Replaced oil strainer
Replaced oil filter stand gasket and crank case ventilation seal. Also performed carbon buildup cleanup.
Oil seals needed to be replaced on the upper CAM cover and internal areas.
Oil leak from the oil separator and also replacement of an O2 sensor.
Oil smell continues to intermittently enter the cabin.
Recurring oil leak spilling onto the exhaust manifold causing burning oil smell to enter the cabin.
Oil Leak: Bad gasket between oil filter housing and engine block. Removed intake manifold in order to repace bad seals.
Coil failed caused a cylinder to misfire.
Noticed oil on floor under engine. Remedy - found oil separator leaking Cat 3. R&R oil separator. Cleaned off engine.
Intake manifold actuator failed.
had to have the gas tank replaced due to the small silver disc at the gas intake failing - gasoline pump got stuck and the disc would not seat properly - this is a "cold weld" and forced replacement of the entire tank
code PO174 bank 2 system too lean. they replaced a sensor and the oil separator and the problem still exists.
Check engine light. They replaced an intake manifold flap. I got it back the next day and the light came on again.
They now think it's an air intake hose issue. Parts ordered.
The vehicle has gone in approximately 5 times for a check engine light issue. On the most recent visit, they replaced the oil separator. The check engine light has not returned since.
The dealer could not identify a problem. Proposed to remove an engine to figure it out ($5K labor only to remove and reinstall). Got it from the dealer in worst condition than initially.
The "Diesel" sound on cold start. Dealer stated earlier VIN did not match engines with valve issue. Stated this time start up noise fixed via software update. Engine noise is now gone.
Grinding noise and oil light on cold starts returned. This time dealer replaced oil filter flange and problem was resolved.
Broken fuel sensor(car inoperable for 5 weeeks, sunroof rattle
Governor engaged while driving. No discernable cause, but dealer fixed the problem with a software upgrade.
Oil Pump not functioning properly. TSB recall notice from Audi was used to solve problem.
The fan always had problems and it started smoking last week! Repair cost would be $400+labour...not like. My husband tried fixing it but it's close to the end of its life.
Spark plugs and something else need to be replaced
Also replaced the fan.
Cleaned carbon out of engine.
Update: one month later might have total engine failure despite all service at dealerships. Ordered new engine, dealer agreed to pick up 80 percent because we've bought three vehicles from them.
New engine was received & placed in vehicle by dealer - vehicle was in service for about 90 days. Q7 now runs very smooth - dealer also serviced transmission free of charge.
O2 sensor replaced, reset 10k service reminder as this is not included with optional AUDICARE service package.
Misfiring and Hesitation
Misfiring continues, check engine comes on. Dealer sees errors and updates codes.
EPC light is on,key was stuck in car. Brake light malfunction and door handle malfunction
Engine misfiring. Dealer states no trouble found. Rear fog light repaired. Rear door handle button won't lock doors.
Won't start. ESP warning and check engine light. Misfiring. Water Ingress. MMI replaced as goodwill (Warranty Expired).
Won't start ESP light and check engine. Misfiring. ECM replaced.(Goodwill)
Won't start ESP warning light. Moisture in vehicle. (Goodwill)
Power Stud and Wiring checked
Misfiring and won't start.
Deal states new battery is needed and G17 Fueling injector clean for carbon build up. Repair was declined and deal wish to no longer work on vehicle. "LMFAO"
Dieseling, engine rattle, oil injector
Engine Coil failure
Timing chain skipped. Timing chain tensioners, guides, cogs replaced. All valves were reported bent due to timing chain skipping and creating need to remove engine, bore cylinder heads, and replace all valves.
Had to replace one catalytic converter and O2 sensor
Rear coolant leak
Engine fault, fuel pressure sensor faults replace sensor in fuel system still an issue.
Replace catalytic converter Replaced fuel pump
Fix coolant leak reported in Jan..
Replaced serpentine belt tension pulley.
Replaced oil filter and flange unit. Vehicle was making a noise intermediately at startup. Sounded as if top half was not being lubricated with oil.
Cylinder head had the water jacket leak into number 5 cylinder. This was caused by erosion to the head itself. Cylinder head is being welded by a shop and will get a valve job and be resurfaced. Car is still being worked on.
Front Oxygen sensor code detected and replaced.
Noise and oil pressure indicator after sitting for a couple of days. The dealer replaced oil filter flange kit as per TSB 2015411/4.
Oil Pressure light came on frequently. Audi decided to replace the ENTIRE ENGINE. I think they may have an issue with Q7s as the service manager indicated that this was not the first vehicle he had seen where the corporate office decided to replace the
Faulty under hood heat sensor turning cooling fan on at random, flattening battery. Sensor replaced under extended warranty but battery not covered - had to be replaced.
Vehicle occasionally loses power when going from standing start up an incline, when motor is already warm. It then revs high before coming right. Only happened twice, but no trace found on computer. Tested by mechanics, but could not repeat.