Jetta Hybrid Trans Stuck in Limp Mode, Rough Shifting

I experienced similar transmission problems with my 2011 VW Golf Hybrid. The symptoms started exactly as described, rough shifting, transmission warning light, and the car going into limp mode. The issue turned out to be more complex than just old transmission oil. After diagnosis, the root cause was found to be an undervoltage condition affecting the transmission control module. This was causing erratic shifting patterns and the slipping transmission symptoms. The fix required: Full transmission diagnostic scan, Replacement of the transmission control module, Recalibration of the hydraulic fluid pressure sensors, Complete transmission oil replacement with the correct specification fluid This was a serious electrical issue that could have led to complete transmission failure if left unaddressed. Given your relatively low mileage, I suspect you may be facing a similar electrical/electronic issue rather than normal wear and tear. Best to have it checked immediately to prevent potential damage to the transmission system. The hybrid powertrain adds complexity to transmission problems, so ensure the shop has experience with hybrid transmissions specifically.

Thanks for your detailed response. Your experience sounds really similar to what I went through. I will definitely get it checked out asap and make sure to find a shop that knows their way around hybrid transmissions. Quick follow up, do you remember roughly how much the full repair cost you? Also, has your automatic transmission been working properly since the fix, or have you noticed any other issues popping up? My main concern is making sure the transmission performance stays reliable after repair, especially given the car might still be worth fixing at this mileage.

Had the exact same automatic transmission issues fixed about 3 months ago. Total cost came to 240€ for diagnosing and resolving the undervoltage problem affecting the transmission control module. The transmission performance has been flawless since the repair. No more rough shifting or warning lights. The transmission oil replacement made a noticeable difference too, shifts are now smooth and predictable just like when the car was new. I track all my repairs carefully and can confirm there have been zero transmission problems since getting it sorted. The automatic gearbox works perfectly now, even under heavy load or in stop-and-go traffic. Given your low mileage, fixing it now will definitely be worth it to prevent more extensive transmission damage. Just make sure they do a proper transmission flush with the correct spec fluid when they service it. These hybrid transmissions need specific maintenance to keep running properly.

Got all your advice and went ahead with the repairs last week. The diagnosis matched what you described, it was indeed an electrical issue with the transmission control module causing the erratic shifting. The shop did a complete transmission service including: New control module installation, Full hydraulic fluid flush, Fresh transmission oil replacement, System recalibration Total cost was 280€ which seems reasonable compared to your experience. The automatic transmission now shifts perfectly again and all warning lights are gone. Really glad I caught this early before any major transmission damage occurred. The mechanic I found specializes in hybrid transmissions and took time explaining everything. Much better experience than my previous repairs. Thanks for helping point me in the right direction with the diagnosis. Will definitely keep monitoring the transmission performance but feeling confident the issue is properly resolved now.