Audi A5 Transmission Grinding Signals Sensor Failure

Had similar symptoms on my 2018 Audi A4 last winter. The transmission warning and limp mode turned out to be more than just a sensor fault, the transmission oil level was critically low, causing those grinding noises and rough shifts. The transmission pressure sensor was sending correct signals, but the root cause was a slow leak at the transmission pan gasket. This allowed transmission fluid to gradually seep out, leading to inadequate pressure in the system. When transmission oil pressure drops too low, the car enters limp mode to prevent serious damage. The repair required: Complete transmission oil flush, New transmission pan gasket, Replacement of the transmission oil filter, Proper oil level verification using diagnostic equipment This was a serious issue that could have led to complete transmission failure if left unaddressed. The transmission sensor readings helped identify the problem early, preventing more extensive damage. For your A5, recommend getting a proper pressure gauge diagnostic test first. This will show if its truly a transmission sensor problem or an underlying oil pressure issue like mine was.

Thank you for sharing your experience with the transmission issues. This really helps since I am facing nearly identical symptoms with my A5. The transmission problems have me worried about potential repair costs. Would you mind sharing how much you ended up paying for the complete repair? Also curious if you have experienced any other transmission issues since the fix was done? I agree a proper pressure gauge test makes sense as the first diagnostic step to pinpoint whether its a faulty sensor or actual oil pressure problem. Better to catch these transmission issues early before they get worse.

After having the same oil pressure problems fixed on my A4, I can share that everything has worked perfectly since the repair. The transmission oil pressure sensor fault was resolved completely and the grinding noises disappeared immediately after service. The total repair came to 365 Euro, which covered fixing the low gearbox oil level and replacing necessary components. Looking back, catching this early through the pressure sensor warnings prevented what could have been much costlier transmission damage. The transmission shifts smoothly now with no warning lights or limp mode issues in the past months. Getting a proper diagnosis of the oil pressure system was key, the pressure switch readings helped identify the exact problem quickly. Based on how similar your symptoms sound, having a professional check both the transmission pressure sensor and oil levels should give you a clear picture of what needs fixing on your A5.

I took my A5 to a certified transmission specialist yesterday based on the helpful advice here. The pressure gauge diagnostic confirmed it was indeed a transmission oil pressure problem, not just a faulty sensor. They found a slow leak causing low fluid levels, similar to what others experienced. The complete repair included: New transmission pan gasket to fix the leak, Full transmission oil flush, Fresh filter, Proper pressure sensor calibration Total cost came to 410 Euro, more than I wanted to spend but worth it to prevent bigger transmission issues down the road. The grinding noises and rough shifting are completely gone now. The transmission warning light cleared and it shifts perfectly again. Really glad I got this checked out early before the low oil pressure could cause serious transmission damage. Thanks to everyone who shared their similar experiences and guided me toward the right diagnosis path.