2017 Audi Q7: check engine light

Filed Oct 25, 2026 · Engine · NC

In XXX, my 2017 Audi Q7 3.0T unexpectedly lost engine power while traveling approximately 70 mph on a highway in [XXX]. A "Drive System Malfunction" warning appeared. The driver pulled over, shut off the engine, and restarted it; the vehicle then drove normally. The sudden reduction in power at highway speed created a risk of collision with surrounding traffic. The precise cause is UNKNOWN. I reported the highway-speed loss of power and warning to Audi Wilmington. At its XXX visit (102,255 miles), the dealership documented the warning and multiple engine misfire codes. It identified a vacuum leak at a broken oil-fill pipe neck, replaced the pipe, cleared codes, and reported no issue during its test drive. The intermittent power loss did not recur during that visit. The vehicle also had recurring excessive oil consumption. In XXX (104,261 miles), Audi Wilmington found it approximately 1.5 quarts low and documented possible piston-and-ring replacement if proposed treatments failed. Those proposed repairs were not performed. In XXX (approximately 109,320 miles), the vehicle again showed a Drive System Malfunction warning and check engine light. Maguire Audi documented multiple misfires and a persistent cylinder #2 misfire after service, and suspected internal engine damage. The vehicle has been out of service since then. Independent testing in XXX confirmed cylinder #2 had 35 PSI compression and 100% leak-down, with part of an exhaust valve missing and oil on the piston. The connection, if any, between the XXX power loss and later engine damage is UNKNOWN. Authorized Audi dealers and an independent shop have inspected the vehicle; I am unaware of any inspection by police, insurers, or the manufacturer. The vehicle remains in my possession and is available for inspection. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 5, 2026 · Electrical · CA

The vehicle has a recurring electrical failure involving the camshaft position sensor circuit (DTC P0365). The sensor itself is functional, but the wiring harness leading to the sensor develops internal copper fatigue due to a design flaw in the factory routing. The harness is bent tightly behind the passenger-side cylinder head, causing vibration-induced internal wire breakage that is invisible externally. This failure is well known to Audi dealers and has been reproduced and confirmed by multiple service centers. The problem is not caused by the sensor, plug, or engine components. It is caused by the wiring harness design, which repeatedly fails in the same 6–10 inch section. The defect causes intermittent loss of camshaft signal, illumination of the check engine light, and inability to pass emissions. Repair requires cutting open the harness and splicing in new wire, costing approximately $700–$1,200 each time. This is a repeated electrical defect caused by poor harness routing and inadequate wire durability. This issue affects safety indirectly because the vehicle cannot reliably report camshaft position to the ECM, and the failure is unpredictable. The defect is widespread among vehicles using the same engine and harness design.

Filed Feb 11, 2026 · Transmission · 120,000 miles · NC

The contact owns a 2017 Audi Q7. The contact stated that while driving approximately 65 MPH, the contact became aware of an abnormal odor. The vehicle started shaking, and the drive train malfunction indicator was displayed. The contact pulled over to the side of the road, and the vehicle was towed to an independent mechanic, where it was diagnosed and determined that the exhaust valve had burned a hole through cylinder #1 due to a misfire. The contact notified the dealer, but assistance was declined. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 120,000.

Filed Jun 11, 2025 · Engine · MN

The issue is related to Audi TSB 2048402/3. 2017 Audi Q7 3.0T. First the an engine light appears, then get Drive System Malfunction Warning appears, then car misfires, then car goes into limp mode causing the car to rapidly slow down (while driving on a highway!!!!!). This is is common issue on the 2017 Audi Q7, code is P05A000 Active Grill Shutter "A" Stuck on. Which then triggers the Drive System Malfunction, misfire, and limp mode. Audi will not repair due to mileage on vehicle. Concern is this is a know issue and a safety concern.

Filed Dec 9, 2024 · Engine · FL

Oil consumption issue began June 2021 with my 2017 Audi Q7 with the 3.0 engine, we were at 78,841 miles. Our vehicle was always serviced at the dealer on the recommended schedule. The dealer stated high oil consumption of 1 quart per 1,000-2,000 miles was normal. The high oil consumption issues continued. At 99,559 miles the car began shaking on the way home from a routine oil change. They found cylinder 3 spark plug covered in oil and replaced all spark plugs to clear misfires. At 104,002 miles the N428 oil pressure regulation valve was replaced, which seemed to improve oil consumption temporarily, but gradually got worse with frequent top offs. On 1 December 2024 at 123,616 miles the car started to shake while traveling at 70mph on the interstate, with the engine lights on. The dealer found crusted spark plugs and identified that cylinder 1 had a burnt/broken exhaust valve due to excessive oil consumption and residue buildup. The required long block replacement would exceed the value of the car. Clearly a defect in the 3.0 Audi engine.

Filed Dec 6, 2024 · Engine · VA

Driving with the family on interstate 81South when suddenly the car went from riding smoothly to a rough rumbling sensation. Then all sorts of alarms sounded and the engine light, oil light and system malfunction indicator light came on simultaneously. We pulled over immediately and turned the car off. We looked in the manual to check the severity of the indication lights. We wanted to determine if we could drive to the nearest exit. We started it back up to see if it was some sort of glitch. It remained so thankfully we were right near an exit and exited and called for roadside service. It was towed from Christiansburg, VA back to Roanoke Audi at 2006 Peterscreek Rd Roanoke, VA 24017 on Nov 9th. The dealership concluded that cylinder 1 was burned out with a possible damaged long block assy. I have had all services and taken great care of the car. However, in between services the car would always require an additional 1qt of oil.

Filed Jun 13, 2023 · Electrical, Lights · NY

When driving into a dimly lit area the car rings and displays the message front left side marker defective. The warning stays on for some time and then goes away before returning again. This continued for a few weeks. The car then experienced a full electrical system malfunction, doors unlocking and locking randomly while driving before dinging repeatedly with multiple warnings displayed in the dash and then stalled in the middle of the road. The vehicle would not shift into park. Multiple warnings continued to ding and flash in the dash. After being turned off for 20 minutes the car was able to be started shifted into Drive and driven with no warnings displayed. The car was taken to the dealership for diagnostics which were performed, but with no electrical system malfunction displayed. The left side marker warning was still on, but the dealer said there was no fix for this. The following month the car was taken for 60,000 mile service. At this time the dealer advised the fix for left side market was replacing the entire headlamp fixture. The service was declined. When the vehicle left the dealer the cruise control was on and would not turn off. After turning off the car and turning it back on the cruise control was off. After driving a short distance the speed control warning dinged and displayed and the cruise control was back on. The orange engine light was also displayed although there was no written warning for this.