Audi Q8 Transmission Issues: Oil Pressure Sensor Alert

I had a similar issue with my Audi Q7 from 2019. As someone with moderate experience working on cars, I immediately recognized those transmission issues symptoms when they appeared on my vehicle. The oil pressure sensor was indicating normal levels, but after a proper workshop inspection, it turned out the transmission oil level was actually too low, despite what the sensor showed. The pressure switch was giving false readings, which explains the misleading sensor data you are getting. The repair involved: Complete transmission oil level check using proper pressure gauge equipment, Replacement of faulty pressure sensor, Oil top-up with the correct specification fluid, System recalibration Total cost was 365 Euro and took about 4 hours to complete. The grinding noise and gear slipping stopped immediately after the fix. To help further with your specific case, could you share: Build year of your Q8, Current mileage, When was the last transmission service, Are you noticing any oil spots under the car, Which transmission type (automatic/manual) This information would help determine if your issue matches what I experienced and if similar repair steps would apply.

Thanks for the detailed feedback. My Q8 had its last service 3 months ago at 15000 KM, and these transmission issues only started recently at 18947 KM. The sensor fault readings from my diagnostic tool match your description exactly. No oil spots visible under the car, which makes me think the oil pressure sensor might indeed be the culprit rather than a major transmission issue. Will request the workshop to specifically check the sensor with their pressure gauge equipment before proceeding with any major repairs.

Glad my previous experience could help. Since you mentioned having similar sensor fault readings, this definitely reinforces my suspicion about the pressure sensor being faulty. The fact your Q8 has relatively low mileage and no visible leaks also points toward a sensor issue rather than mechanical transmission damage. For comparison, when my transmission fault occurred at 22000 KM, the diagnostic also showed incorrect pressure readings while the actual transmission was mechanically sound. The repair shop confirmed the pressure sensor was sending false data to the control unit, triggering the emergency mode unnecessarily. A professional workshop pressure gauge test should reveal whether the transmission oil pressure is actually normal, despite what the faulty sensor indicates. This diagnostic step is crucial before any major transmission work. Quick tip from my experience: make sure the workshop documents the pressure readings before and after the sensor replacement. This helped me verify the repair was successful, as the new sensor showed the correct oil pressure values, and the transmission shifted smoothly again. Let us know what the workshop finds. Given the similar symptoms and diagnostic codes, I expect youll be looking at a similar repair cost and timeframe as my case.

Thank you all for the input. After taking into account the shared experiences, especially regarding the oil pressure sensor symptoms, I feel more confident about the repair direction. Will book the car in next week and specifically request them to: 1. Test transmission oil pressure with their professional pressure gauge 2. Check the transmission sensor readings 3. Document all pressure values before and after repairs 4. Verify oil levels despite sensor readings Good to know the repair costs should be around 365 Euro if its just the pressure sensor. Much better than what I initially feared might be a complete transmission issue. The similar fault codes and symptoms at comparable mileage really help confirm this diagnosis. Will start with the sensor inspection and pressure testing before authorizing any major transmission work. Great to have confirmation that no oil spots and recent servicing suggest a sensor fault rather than mechanical damage.