VW Arteon Trans Issues Linked to Faulty Oil Pressure

Having some experience with VW transmissions, I dealt with similar symptoms on my 2017 VW Passat. The cooling system issues can definitely affect transmission performance, as proper oil pressure and temperature control are crucial. In my case, a leak detection test revealed that the problem was actually related to a faulty pressure sensor connection. The transmission was getting incorrect readings, causing it to go into limp mode. The workshop found a damaged wire harness connecting to the transmission pressure sensor, which was causing intermittent signal issues. The repair involved replacing the wiring harness and connector, which cost 95€. After fixing this, the transmission returned to normal operation, and both the rough shifting and emergency mode issues were resolved. However, to better assist with your case, could you share: Current mileage, When did these symptoms first appear, Any recent transmission service history, Are there any transmission fluid leaks visible, Does the problem get worse when the engine is hot These details would help determine if your issue is similar to what I experienced or if it might be related to other cooling system components. While waiting for your response, I recommend having a proper transmission diagnostic scan done, as the cooling fan operation and transmission temperature sensors should be checked to rule out related issues.

Thanks for the helpful information. I just had the car serviced last month at 118105km. The symptoms started appearing gradually over the past few weeks. I noticed some transmission fluid spots on my driveway, and the issues definitely get worse after driving for about 20 minutes when the engine is warm. The cooling fan seems to run more frequently than usual too. I did a pressure gauge test which showed irregular readings. My mechanic mentioned the cooling system might need a thorough inspection to identify if the radiator repair could fix these issues. I am hoping to avoid a complete transmission replacement if possible. Has anyone else experienced transmission issues becoming worse with heat? Should I be concerned about the cooling fan running more often than normal?

Based on your description, this sounds very similar to what I experienced with my VW Passat. The combination of fluid spots, heat-related symptoms, and irregular pressure readings strongly suggests a cooling system problem affecting the transmission. When my car showed these symptoms, a thorough inspection revealed that the transmission oil cooler had developed micro-cracks. This caused inconsistent pressure and inadequate cooling, leading to the transmission overheating and similar fluid leaks. The increased cooling fan operation is a clear warning sign, the system is trying to compensate for reduced cooling efficiency. In my case, the car overheating issues became more pronounced during longer drives, just like yours. The repair required: Replacing the transmission oil cooler (480€), Installing new cooling lines (150€), System flush and refill After these repairs, the transmission performed normally again, and the cooling fan returned to regular operation. The leak detection test afterward showed proper pressure readings, confirming the fix. Since your symptoms match my experience so closely, I recommend getting the cooling system components inspected, particularly the transmission oil cooler and lines, before considering more extensive transmission work. A radiator repair specialist should be able to properly diagnose these issues using pressure testing equipment.

Thank you for sharing those details about your Passat experience. The similarities between our cases are really helpful. I will get my cooling system and transmission oil cooler thoroughly checked first, since the symptoms match what you described, especially the connection between engine temperature and transmission performance. The fluid spots and increased cooling fan activity definitely seem to point toward a cooling system issue rather than internal transmission damage. Those repair costs you mentioned (480€ for the oil cooler and 150€ for cooling lines) are much more manageable than a full transmission replacement. I will schedule a pressure test specifically focused on the transmission cooling components and have them inspect for any micro-cracks in the oil cooler. The radiator repair shop should be able to properly diagnose this using their pressure gauge equipment. One last question, after your repairs were completed, how long did you wait before doing any heavy driving to make sure the cooling system was working properly? I want to ensure everything is fully sealed and functioning correctly when I get mine fixed.