Gearbox Malfunction :(

[fastboatster]

just so to be clear - what do you mean when you say the car shuts off? does the engine stops to run or it keeps running but it feels like the car is in neutral? don't waste your money on the parking brake module, when the trans is malfunctioning, you'll get a bunch of warnings from different modules such as parking brake. It is happening when the fluid in the gearset chamber of your trans gets hot, that's where the sensor you get a code for is located. It is separate from the chamber where your clutch and mech unit are, mech unit or pcbs are not likely to fix this.
read this tsb, apparently wasn't that uncommon on b8s:
https://static.nhtsa.gov/odi/tsbs/20...63866-7690.pdf
some video of it's replacement:
https://www.youtube.com/watch?v=N_UcNe2mDRM
https://www.audizine.com/forum/showt...se-post/page11

[audis4culver]

Thanks fastboatster - very helpful links. I am 99.99% sure that its my selector sensor. I have read all the blogs you sent and they match exactly. I guess they call it limp mode - yes my car simply rolls down the street but the electronics are still on. So the car doesnt go completely off.

I am now shopping around to see who might can do this type of complex job. Also not sure if I should replace the entire mechatronic since it will be open? My car is only 55K miles.
In atlanta - there is the dealership and then a few european shops. The shop I really like is looking into if this is something he can do.
So right now - dead in the water until I can find someone to do this.
Thanks for the links - I should have found them first before posting.

[Izzyz28]

Thanks fastboatster - very helpful links. I am 99.99% sure that its my selector sensor. I have read all the blogs you sent and they match exactly. I guess they call it limp mode - yes my car simply rolls down the street but the electronics are still on. So the car doesnt go completely off.

I am now shopping around to see who might can do this type of complex job. Also not sure if I should replace the entire mechatronic since it will be open? My car is only 55K miles.
In atlanta - there is the dealership and then a few european shops. The shop I really like is looking into if this is something he can do.
So right now - dead in the water until I can find someone to do this.
Thanks for the links - I should have found them first before posting.

Mine is in the shop right now for the selector lever sensor and harness. 2013 S5 with 40K on the clock, fully serviced. I received a malfunction one day out of the blue, and it had both the P179E and P179F codes stored. Cleared them, drove it for about a week, and they popped again. Happens only when hot, so the sensor/harness is flaking out. I found an independent shop to pull the trans. and perform all the work, $4,100 out the door is the estimate. I've heard Audi wants $7k.

[gj314]

Mine is in the shop right now for the selector lever sensor and harness. 2013 S5 with 40K on the clock, fully serviced. I received a malfunction one day out of the blue, and it had both the P179E and P179F codes stored. Cleared them, drove it for about a week, and they popped again. Happens only when hot, so the sensor/harness is flaking out. I found an independent shop to pull the trans. and perform all the work, $4,100 out the door is the estimate. I've heard Audi wants $7k.

My car had the same issue before I bought it (2013 S4). Was fixed for $2400. image-2021-04-15-13:26:28-119.jpg

[Izzyz28]

My car had the same issue before I bought it (2013 S4). Was fixed for $2400. image-2021-04-15-13:26:28-119.jpg

LOL, I need to find that shop. What do they charge for labor, $50 and hour? I'm in Chicago anyways, gotta pay to play I guess.

[gj314]

LOL, I need to find that shop. What do they charge for labor, $50 and hour? I'm in Chicago anyways, gotta pay to play I guess.

Transmission shop in Old Saybrook, CT called Eriksson Industries
http://www.erikssonindustries.com/

[audis4culver]

Mine is in the shop right now for the selector lever sensor and harness. 2013 S5 with 40K on the clock, fully serviced. I received a malfunction one day out of the blue, and it had both the P179E and P179F codes stored. Cleared them, drove it for about a week, and they popped again. Happens only when hot, so the sensor/harness is flaking out. I found an independent shop to pull the trans. and perform all the work, $4,100 out the door is the estimate. I've heard Audi wants $7k.

thanks for the info. first shop I called suggest doing the mechatronic as well while everything is open. i am think i most likely will do it. dont have a quote yet from them. I have emailed Atlanta dealership and waiting on a return. too bad no one has figured out how to somehow magically bypass this sensor warning - too bad we cant inject meth into this thing to keep it cool !! I have read other posts where they paid 500 for the sensor and then 1500 for the labor.

[fastboatster]

thanks for the info. first shop I called suggest doing the mechatronic as well while everything is open. i am think i most likely will do it. dont have a quote yet from them. I have emailed Atlanta dealership and waiting on a return. too bad no one has figured out how to somehow magically bypass this sensor warning - too bad we cant inject meth into this thing to keep it cool !! I have read other posts where they paid 500 for the sensor and then 1500 for the labor.

Seems like a lot of people have/had problems with this sensor, myself including (2010 S4)
Unfortunately, this sensor is kind of needed, it's not just returning selector lever position but also rotational speeds of both input shafts. The trans can't shift without knowing these speeds. But it is entirely possible that it's just the selector position part, and input shaft speed sensors are actually almost always okay. Seems like on B9 A4 where they continued to use DCT (DL382 I think), they moved that selector lever sensor outside the transmission and left the input shaft speed sensors in the same location. It would be great if there was some kind of service access cover to reach that sensor without tearing the trans down and dropping it. Something along these lines:

P.S. you can easily get to your mech unit later yourself if it goes bad, you don't need to drop the trans for that and can be done on jackstands. Check the clutch condition instead, though it should be good at 55 kmiles