Dangerous Q7 Transmission Symptoms Point to Oil Sensor

I had a similar situation with my Audi Q5 2017. Having dealt with a few transmission issues before, this particular problem caught my attention since it matches what I experienced almost exactly. The transmission issues started the same way, warning lights, rough shifting, and eventually limp mode. Initially, I also thought it was the transmission sensor acting up, but after taking it to the workshop, they discovered the transmission oil level was critically low. This was causing inadequate oil pressure and irregular shifting patterns. The fix involved a complete transmission oil level check, system diagnosis, and oil refill. The total cost came to 365 Euro including labor and fresh transmission fluid. Since the repair, the transmission has been shifting smoothly with no warning lights. Before jumping to conclusions about sensors, it would be helpful to know: Current mileage on your Q7, When was the last transmission service performed, Are you noticing any transmission fluid leaks under the car, Does the problem occur more frequently when the engine is cold or warm These details would help determine if youre facing a similar oil level issue or if its actually a sensor problem.

Last service was at 173000KM about 2 months ago. After closely inspecting under the car, I spotted small transmission fluid drops near the bell housing. The transmission fault seems to get worse when the engine warms up. The oil pressure warning becomes more frequent during highway driving. The fluid leak might explain the rough shifting and transmission issues. Going to have the workshop check both the leak and verify the transmission sensor readings to be thorough. Rather fix this soon before the transmission takes more damage. Worth noting my current mileage stands at 177057KM.

Good to hear you found those transmission fluid drops, that definitely aligns with the symptoms. Having experienced a similar leakage pattern on my Q5, the location near the bell housing often points to a failing transmission seal. The oil pressure warnings during highway speeds occur because thats when the transmission needs optimal fluid pressure the most. The transmission issues worsening with engine temperature also matches my experience. When the transmission fluid heats up, it becomes thinner, making any leaks more pronounced and causing the pressure sensor to trigger more frequently. My suggestion from dealing with this before: Get the leak fixed first before replacing any sensors, Have them perform a transmission pressure test, Request a complete fluid level check after repairs The transmission fault codes might clear themselves once proper fluid levels and pressure are restored. My repair involved replacing the main transmission seal and topping up the fluid, which resolved both the leak and sensor warnings. The cost for my seal replacement and fluid service was around 450 Euro, but catching it early prevented more extensive transmission damage that could have run into thousands.

I appreciate all the feedback about transmission issues and seal problems. Following up on my case, I took the car to the workshop yesterday and their diagnosis confirmed our suspicions. The transmission oil pressure was indeed dropping due to that leak near the bell housing. The main culprit was a deteriorated transmission seal, allowing fluid to escape especially during higher temperatures. The mechanic showed me how the transmission sensor readings were fluctuating wildly due to the inconsistent oil pressure. They replaced the faulty seal, performed a complete transmission fluid change, and ran multiple pressure tests to ensure everything was working correctly. The total repair came to 475 Euro, which seems reasonable considering the potential damage that could have occurred. After driving for about 100km since the repair, the transmission shifts perfectly again with no warning lights or rough changes. The oil pressure remains stable even during extended highway driving. No more fluid spots under the car either. Thanks for helping me identify the issue early. The workshop confirmed that catching the leak before it caused major transmission damage likely saved me thousands in repairs.