Audi Q2 Power Loss Linked to Crank-Cam Timing Issues

Had similar symptoms with my 2019 Audi Q3. The engine light came on during highway driving, followed by noticeable power loss and increased fuel consumption. The crankshaft position sensor was failing, causing incorrect timing signals between the crankshaft and camshaft. The repair involved replacing the crank sensor and performing a complete diagnostic to ensure the timing chain wasnt affected. While the sensor itself is a relatively small part, accessing it required significant labor as several components needed removal. The timing chain was fortunately intact, which would have been a much more serious repair. These symptoms shouldnt be ignored, a faulty crank sensor can cause engine misfires and potential damage if left unchecked. The jerky acceleration and power loss happen because the engine control unit receives incorrect positioning data, leading to improper fuel injection timing. The repair took about 4 hours at the shop, and the car has run perfectly since then. This is a known issue that can occur in this engine family, but proper diagnosis is crucial before any parts replacement.

Thanks for sharing your experience with the Q3 crank sensor issue. Mine got fixed about 3 months ago and the engine synchronization is back to normal now. The mechanic confirmed it was indeed the crankshaft position sensor causing the timing issues with the cam sensor. Really curious about the repair cost on your end? My bill came to 475 Euro including parts and labor. Also wondering if youve noticed any other issues pop up since the repair?

Great to hear your Q2 is running smoothly again. The crank sensor repair on my Q3 was actually more reasonable, coming in at 340 Euro total for parts and labor. The crankshaft to camshaft reference values have been perfect since the fix, and the engine light hasnt returned. The timing between crankshaft and camshaft is now spot-on, which has restored the proper engine performance and fuel efficiency. No other issues have emerged in the months following the repair. The engine runs much smoother now that the crank sensor is providing accurate positioning data to the engine control unit. If your repair included a full diagnostic scan like mine did, you should be good to go. These sensors typically last quite a while once replaced, and proper engine timing helps prevent excessive wear on other components like the timing chain. Worth noting that regular monitoring of engine performance can help catch any potential sensor issues early before they cause more significant problems.

Thanks for helping me make a decision. After your helpful advice, I took my Q2 to a trusted mechanic last week. The repair was straightforward, they confirmed the faulty crank sensor and replaced it within a day. The timing chain looked fine during inspection, which was a huge relief. The engine light turned off right after the repair, and the sluggish performance completely disappeared. Fuel consumption is back to normal levels too. The entire job cost me 475 Euro, which seems fair considering the diagnostic work and labor involved. The mechanic also checked the engine synchronization and confirmed everything was running perfectly. They explained how the crank sensor affects engine timing and showed me the old sensor which had visible wear. Really glad I didnt wait longer to fix it, as it could have led to more serious engine problems. After 3 months and several thousand kilometers, the car runs like new. No warning lights or performance issues have come up since the repair. Definitely worth getting it sorted quickly when these symptoms first appear.