Guide to Repairing a PDK Transmission
#1531
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Yes, most of the time all the distance sensor errors are Intermittent , with increasing frequency.
Hot TCU that can not be touched sounds wrong, yes.
>Or there is an independent shop with a PIWIS that could do the calibration for me even if they're not willing to do the full distance sensor install.
It's more like the other way around. As calibration can be very stubborn thing - shops that are experienced in it, will most probably not offer it separate from installation. And shops that don't do PDK repairs - I would not trust with calibration. Yes, it's very simple to plugin PIWIS and hit the Start button, but if something goes south - they will have no idea what to do
Hot TCU that can not be touched sounds wrong, yes.
>Or there is an independent shop with a PIWIS that could do the calibration for me even if they're not willing to do the full distance sensor install.
It's more like the other way around. As calibration can be very stubborn thing - shops that are experienced in it, will most probably not offer it separate from installation. And shops that don't do PDK repairs - I would not trust with calibration. Yes, it's very simple to plugin PIWIS and hit the Start button, but if something goes south - they will have no idea what to do
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Memory Modules : remember SC **** settings; A/S/S, PSE, Spoiler, Sport/+ buttons
Phone Mounts : keep your phone up and close and charged
Cupdholders, Sunglass Holsters and more at T-Design9.com
#1532
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For anyone who is curious, I caught the voltage drop happening on video yesterday. You can faintly hear the beep when the "Transmission Emergency Run" error happens, and it is at the same time as the voltage drops to 0. It happens 5 seconds into the video:
#1533
Also, while checking to make sure my connection leads were good, I noticed that my transmission control unit is EXTREMELY hot. Hot enough that you can touch it briefly, but not keep your finger on it. Does anyone know if this is normal? It seems way too hot for normal behavior for a control unit. Has anyone seen a control unit go bad internally? I suppose the heat could be coming from a short in the sensor, but the actual failure is so intermittent right now that it doesn't seem like it would cause that much heat in the control unit.
#1534
other control units get very hot to the touch as well. I used to swap a DSC with the OE one after driving and you could barely touch it for more than a few seconds. Perhaps they’re all this way?
#1535
Rennlist Member
PDK Rear Case Sealing Caps - Updated Part?
I’ve got a 987.2 PDK getting a new distance sensor. I had the Porsche dealer order replacement caps for the rear case, which are superceded from the original part number. Ordered 9G1.321.360.00 and got 9P1-301-125. This is what the new caps look like. Any concerns?
EDIT: Seems like part 9P130615 is the part needed for the 987.2 cover seal. It looks like the part I removed:
Removed Caps
I’ve got a 987.2 PDK getting a new distance sensor. I had the Porsche dealer order replacement caps for the rear case, which are superceded from the original part number. Ordered 9G1.321.360.00 and got 9P1-301-125. This is what the new caps look like. Any concerns?
EDIT: Seems like part 9P130615 is the part needed for the 987.2 cover seal. It looks like the part I removed:
Removed Caps
Last edited by cbracerx; 06-05-2024 at 02:17 PM.
#1536
PDK Rear Case Sealing Caps - Updated Part?
I’ve got a 987.2 PDK getting a new distance sensor. I had the Porsche dealer order replacement caps for the rear case, which are superceded from the original part number. Ordered 9G1.321.360.00 and got 9P1-301-125. This is what the new caps look like. Any concerns?
EDIT: Seems like part 9P130615 is the part needed for the 987.2 cover seal. It looks like the part I removed:
I’ve got a 987.2 PDK getting a new distance sensor. I had the Porsche dealer order replacement caps for the rear case, which are superceded from the original part number. Ordered 9G1.321.360.00 and got 9P1-301-125. This is what the new caps look like. Any concerns?
EDIT: Seems like part 9P130615 is the part needed for the 987.2 cover seal. It looks like the part I removed:
#1542
Rennlist Member
I've got a simple problem that is challenging me with filling the PDK fluid after the complete drain that is performed with a distance sensor repair. On a 987.2 I've got 5l of fluid that was drained, but can only get 3l of fluid into the transmission. I've tried running the trans and shifting into R and D (which now actually does something now) and then leaving the engine running in P and attempting to fill further - but no luck. At the point I am letting the trans cool down overnight and will see how much I can get in tomorrow when cold. This transmission needs to be calibrated, if that matters. But at least now when I put in R or D, there is actual gear movement and the vehicle feels like it would move if I took my foot off the brake.
Any thoughts on where I could be going wrong with the fill? I know that "fill mode" will allow .2l to be added, but I am far away from that little remaining.
Any thoughts on where I could be going wrong with the fill? I know that "fill mode" will allow .2l to be added, but I am far away from that little remaining.
#1543
Rennlist Member
I can report another successful t-design9 distance sensor replacement in a 2011 987.2.
Vehicle drove "like new" without any bad behavior right from the start. I did have to clear a PDK DTC P18B4 for "Software Error" before starting the calibration (pro tip - this code can only be deleted with the engine not running).
Last edited by cbracerx; 07-01-2024 at 11:05 AM.
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t-design (07-02-2024)
#1544
991.1 PDK
Hello
I need your help please. I have a 2013 991.1 Carrera S with a PDK.
Last summer I was advised by my mechanic to change the engine and gear coolers since the car is almost 90k miles.
Prior to this there was no problem with the PDK. Immediately; and after this change of coolers the PDK started to behave in a very strange way.
The PDK will make a strange noise (like miss-shifting in a MT); just before the 4th gear and mainly when the car is cold.
I went back to the mechanic and he said (ops must be your PDK is damaged!).
He did a PDK filter and oil change with a reprogramming that serve nothing at all.
reading your post I was thinking could this be a Temp sensor issue? do I need to do a special reprogramming to the TCU?
please help
many thanks
I need your help please. I have a 2013 991.1 Carrera S with a PDK.
Last summer I was advised by my mechanic to change the engine and gear coolers since the car is almost 90k miles.
Prior to this there was no problem with the PDK. Immediately; and after this change of coolers the PDK started to behave in a very strange way.
The PDK will make a strange noise (like miss-shifting in a MT); just before the 4th gear and mainly when the car is cold.
I went back to the mechanic and he said (ops must be your PDK is damaged!).
He did a PDK filter and oil change with a reprogramming that serve nothing at all.
reading your post I was thinking could this be a Temp sensor issue? do I need to do a special reprogramming to the TCU?
please help
many thanks
#1545
Owner of a Cayman R w/ PDK here. Two weeks ago, dash display showed “Transmission emergency run” in white. Did a bit of spirited driving in the AM, then parked the car and had lunch. Afterwards, jumped back into the car and started it up. That’s when the warning was displayed. No reverse or any forward gear was selectable; car had no drive. Turned off engine and tried some minutes later, but the situation remained. Repeated the sequence again after a further wait with the same outcome.
Car has just over 19k miles. PDK shifted fine during the morning drive, even when in Sport Plus mode. An indy shop owner in the group suggested removing the cables from the battery and connecting them together to reset the system in case it was just a software glitch. But the problem persisted.
Had the car flat-bedded to a Porsche dealer. The diagnosis came back late last Friday via email with the following comment: “Fault code P1706 sensor 5v reference fault, as per Porsche diagnostic flow chart, recommend replacing PDK control unit.” It being the weekend I have not had the chance to call back and talk to the Service Advisor, but this sounded like the electronics box and not the valve body unit mounted at the bottom of the transmission. Reading through the thread on the Forum it seems the latter is usually the culprit. Has anybody had the PDK electronics box in their 997/987 fail (I will post this on the parallel discussion on the 987 Forum also)? It would be great to hear from those of you with much more technical knowledge than me. Thanks!
Car has just over 19k miles. PDK shifted fine during the morning drive, even when in Sport Plus mode. An indy shop owner in the group suggested removing the cables from the battery and connecting them together to reset the system in case it was just a software glitch. But the problem persisted.
Had the car flat-bedded to a Porsche dealer. The diagnosis came back late last Friday via email with the following comment: “Fault code P1706 sensor 5v reference fault, as per Porsche diagnostic flow chart, recommend replacing PDK control unit.” It being the weekend I have not had the chance to call back and talk to the Service Advisor, but this sounded like the electronics box and not the valve body unit mounted at the bottom of the transmission. Reading through the thread on the Forum it seems the latter is usually the culprit. Has anybody had the PDK electronics box in their 997/987 fail (I will post this on the parallel discussion on the 987 Forum also)? It would be great to hear from those of you with much more technical knowledge than me. Thanks!