[deilenberger]

Can the device that you read the codes with clear the codes? That would be first step IMHO. You've recorded the codes so it isn't necessary to save them... and was this device running software that can read Porsche specific codes (any code > P0999 is manufacturer specific - ie - your P1706 and P1736,) I'd expect a Porsche specific tool to give an explanation of the code.

 

[deilenberger]

I just looked up the fault codes for a 987 PDK transmission. I expect the codes for a 981 PDK to be the same. There is no fault code P1736 for the 987 PDK, but there is one for P1706:

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P1706

Diagnosis information - PDK

Sensor supply voltage 5 V too low

Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are then tested and any faults are stored.

• Ignition on
• The following fault is not detected: P1752

Possible fault causes

• Line between pressure sensors and PDK control unit faulty
• Line between displacement sensor module and PDK control unit faulty
• Pressure sensor 1 faulty
• Pressure sensor 2 faulty
• Displacement sensor module faulty
• PDK control unit faulty

Fault setting conditions

• Sensor supply voltage < 4.5 V

Fault effects

• Gear held
• No R gear
• No emergency program diagnosis
• Transmission limp-home indication in instrument cluster control unit

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There has been at least 1 reported incident of a PDK failure (987 PDK IIRC) which suffered similar error codes and they were cleared up by removing and cleaning and reconnecting the large multipin connector going into the PDK transmission. Cost to do that is 1 can of electronic cleaner (I'd suggest CDC MAF cleaner). This was reported over on RENNLIST. In that case the owner of the vehicle sold it inexpensively thinking they were facing replacement of the PDK transmission. The buyer (also a Rennlist subscriber) fixed it as above and hadn't reported any problems since then.

That would be my first step - read the codes using a Porsche specific tool (in this case - the Foxwell N530 with their Porsche module would be my choice if I couldn't get hold of a PIWIS - but I don't know how well the Foxwell will work with a 981.. it works marvelously well on a 987, The safe bet is a PIWIS of course.) I'd then use the same tool to read some of the values seen by the computer from the PDK such as communications between the first two items and the PDK computer.

Note: I am not an expert in the PDK transmissions - I just own one so I've kept an eye on tech data that's being revealed for the PDK transmission. There are a number of people and companies that are much more capable than I am with the PDK, and if I couldn't fix it with the simple steps I outlined, I'd be reaching out to them to see if they had ideas or someone/somewhere that could perhaps fix it. These are generally found on Rennlist, you can start on the 987/981 forum, look for the PDK sticky, and it will lead you to a much longer discussion in another model forum.

Good luck!

 

[deilenberger]

Awesome im gonna have it flatbedded to an Indy porsche mechanic in Dallas. I cleared the codes and they came back but its just a cheap code reader I bought to see if I could figure anything out. Once I get it down there, I'll let yall know whats going on. Yeah all the pdk replacement posts had me scared.
Thanks so much for the detailed reply!

Sounds like a plan. As far as "all the pdk replacement posts" - so far I've heard of two PDK transmissions that were replaced out of pocket by an owner. There are also a few I've heard of that failed under warranty and replaced at no cost to the owner. Overall - from what I've seen here they're pretty reliable. And as far as not being repairable - that's Porsche making it difficult, but when Porsche does that someone someplace comes up with a way to get around the roadblocks Porsche puts up. I know there are clutch-kits available for the PDK, including kits for transmissions pushing more HP through them than stock. The valve body is available - aftermarket and from Porsche - and the control solenoids are available individually from China and I believe Porsche. If they were really unreliable there would be companies advertising their rebuilding/upgrading capabilities - the fact that there aren't to me indicates the lack of a market for those services, and that lack of a market indicates the PDK's are pretty reliable.

YMMV and I'm all ears on what your independent has to say.