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Gear indicators
Hi everyone, having a bit of a problem with my 2001 A8L D2 transmission. Drove it in this morning and everything functioned fine. However A little while (5 mins) after getting in this afternoon the car has acceleration problems, as if the transmission is slipping. The engine functions ok but the shifting is incorrect and when it does shift it shutters a bit. Nursed it home doing about 45-50 (I live about 7miles from town). It should be noted that upon entering the highway and trying to gain a bit of speed all of the gear indicator lights lit up, leading me to believe this is an electrical issue with the TCM or some such component. I restarted the car and the lights didn’t all come on again until I took on a small hill before my house. About a minute after that my check engine light came on. I checked the code with my onboard reader and it’s a PO170. Which I know can mean a lot of things but I’m most interested in the Mass Airflow Sensor as ive heard that can cause transmission malfunction. I don’t want to take it in to a shop because there are not many around here and the closest Audi dealer is 4 hours away. On a final note, all the gears function properly (Reverse, 1-5, Neautral, Park and Tiptronic). Help much appreciated! Mostly wondering if the PO170 has anything to do with it or how to tell if it’s mechanical instead of electrical. Thank you!!!

Thank for replying so soon! Quick thought wouldent it stay in limp mode once it entered it? Eh I believe the code is in fact PO170 I can double check when I head out to the shop this morning though. I’m no sure(?) The reader (Scangauge 2) only lets me see fault codes. Gonna dig around a bit today and see if I can find water damage anywhere, or loose wires. If the transmission needs replaced I guess so be it. But yesterday it was covered in snow and it got quite warm throughout the day and the snow all melted leading me to believe ya know, water just got somewhere it shouldent. I don’t know haha. I’ll get back on here this evening with what I’ve found

I’m starting to think you guys are more and more correct about it being the actual transmission. Started it just for fun tonight as I couldn’t really do anymore digging due to time restrictions. Anyways what resulted was a second code, PO733. Unlike PO170 it has to do directly with the tranny, which is worrisome. As I said if it needs a new tranny I guess so be it. I’m not sure of the last time it was flushed but I’ve heard that’s honestly not cheap. The ony hope I’m holding on to is the fact that the transmission had NO anomilaies before that day. And all of a sudden it just doesn’t work? I don’t know a lot about transmission if there’s anymore insight it’s greatly appreciated. For now though I think I’m gonna go with probably the cheapest option at the moment and get another TMC. Hopefully it works but I’m prepared for it not to knowing my luck haha. Anyways thx again for all the help everyone. I will upload a YouTube video of a little drive I took, the last drive before having to replace somthing big haha. I’ll get back to you guys with the link tomorrow. Internet slow here.

Here’s the video I was referring to earlier. ( ) - I apologize for the quality. Also it should be noted that the shaking near the end is me trying to operate tiptronic, stay on the road, and video at the same time😂 But there for sure is shuttering. Going in today to check prices on a transmission fluid check and change, as that is due for service anyways. If shops here can do it I’ll most likely get it done tomorrow. Will keep this forum updated as I really want to figure out the problem. Love the car and how much of a joy it is to drive and I miss it already😥

99.9% sure it is a clutch A basket. It needs a rebuild.

Yeh, I’ve read about that haha. Would it cost less to get another transmission or rebuild the clutch? Thx for the input👍

Calling Bozeman Audi tomorrow�� Shops around here useless and I guess if they charge a lot they charge a lot but we’ll see.