Audi Q2 Engine Sensor Issues Causing Power Loss & Stalls

As someone with some experience working on Audis, I had a very similar issue with my 2021 Audi Q3. The symptoms you describe match exactly what I experienced, rough idling, potential engine misfire, and that worrying sensation of stalling engine during startup. Initially, I was also convinced it was the camshaft position sensor, but after taking it to my workshop, they discovered it was actually just a loose connection in the wiring harness leading to the sensor. The diagnostic process was pretty straightforward, they used their computer system to read the error codes and then performed a physical inspection of the wiring. The fix involved properly securing the connection and replacing a damaged section of the wiring. The total cost was 95 Euro, which covered both diagnosis and repair. The entire process took about 2 hours, and the issue has not returned since. Before making any definitive suggestions though, could you provide some additional information about your Q2: What engine size do you have? How many kilometers are on the odometer? Are there any other warning lights illuminated? Have you noticed any particular patterns when the symptoms occur (cold start vs warm engine)? This information would help determine if your issue is similar to what I experienced or if it might be something else entirely.

Thanks for the feedback on my issue. The car currently has 161544KM on the odometer and had its last service just 2 months ago. The check engine light started appearing more consistently during cold starts, and the rough idling seems worse then. The crankshaft sensor diagnostic code also appeared recently when I had it scanned at a local shop. They suggested both the camshaft and crankshaft sensors might need replacement, but I wanted to get more opinions before proceeding with the repairs. The engine stalling symptoms are definitely more pronounced in the morning, which makes me think there could be an electrical connection issue like in your case.

Based on your description of cold start issues and the mileage on your Q2, your situation sounds more complex than my initial wiring problem. While my Q3 showed similar symptoms, the fact that you have both camshaft and crankshaft sensor codes suggests this might be more than just a loose connection. The rough idling during cold starts combined with the stalling engine symptoms matches what many Audi owners experience when both sensors start failing. In my case, the loose connection was a simple fix, but I had another incident later where the crankshaft sensor actually failed completely, causing similar symptoms. Since your car has over 160000km, replacing both sensors might be the most reliable solution. When my crankshaft sensor failed at around 150000km, I initially tried just cleaning the connections, but ultimately needed a full sensor replacement. The total repair came to 320 Euro including both sensors and labor. Given the similarities in our experiences, I would recommend having both sensors replaced rather than trying partial fixes. The cold start issues particularly point toward sensor failure rather than just connection problems. Its worth noting that both my sensor issues were resolved completely after replacement, and the engine performance returned to normal.

Thank you all for the helpful responses. After carefully considering the feedback, I decided to go ahead with replacing both sensors. The mechanic confirmed there was significant wear on both the camshaft position sensor and crankshaft sensor. The total repair cost was 340 Euro, slightly more than expected, but worth it. The timing issues and rough idling have completely disappeared. The engine now starts smoothly even during cold mornings, and there are no more stalling engine symptoms. The check engine light has stayed off since the repair. For anyone facing similar automotive sensor problems in the future, I recommend getting both sensors checked if you experience these symptoms: Consistent rough idling, especially during cold starts, Engine power loss, Multiple sensor-related error codes, Stalling or near-stalling conditions The investment in proper diagnosis and repair was definitely worth avoiding potential long-term engine damage. Thanks again for helping me make an informed decision about this repair.