PDK lost gear 4 with OBD code P1768 and P1764

My Cayman 987.2 S PDK cannot switch to gear 4 anymore. No problem with 1,2 and 3 then jump to 5 and/or back to 3. Gears 5, 6 and 7 and R are ok OBD code found are P1768 P1764 this one is the most repetitive P17D2 P17D8 P1990 P1902 TCU has been replaced by Porsche 3 months ago. Issue started after PDK relearn execution. does anyone heard or had this problem? My mechanic and I plan to check all sensors, connectors and harness from the gearbox to the TCU next Wednesday thanks for your support

https://********.com/forums/997-forum/1172826-guide-to-repairing-a-pdk-transmission.html This may help you.

Thanks Titusn I will read this tonight and let you know how I get progress

If it turned out to be distance / position sensor failure - we have the new sensor! Sensors, mods, accessoriess for your Porsche - Memory Module, Phone Mounts, Sunglass Holster, PDK displacement distance gear position sensor, speed sensor Sensors, accessories, mods, parts for your Porsche. Memory Module remembers sport, a/s/s and pse settings. Find a place for your phone and sunglasses. PDK distance sensor and speed sensor for repairing 7DT45 7DT70 7DT75 transmissions. Fit Boxster, Cayman, 911, 981, 718, Cayenne, Panamera, Macan t-design9.com

Awesome that you are stocking that sensor now considering it seems to be the issue more times than not on these PDK failures. Its crazy that Porsche has forcing people to replace the entire PDK unit at substantial cost just because of some small electrical part failure! It seems almost criminal as they absolutely know what the issue is, and that its possible to repair, but they replace it anyway. Its as insane as replacing the engine because one of the coil packs failed

My guess is Porsche has its reasons. However questionable they look to the owners. Opening PDK is a delicate business (but totally doable). Dealer techs are not trained to do it. So they decided to just not do that and offer full PDK replacement instead. As owners had no other choice (throw away your car?)... More money for PAG, more money for the dealer. Win-win in Porsche terms. But yes, that sensor is a main suspect on older PDKs. That's why we engaged on this very extensive and expensive project. So now owners have a choice of fixing PDK for the fraction of the cost of total replacement. Win-win in T-Design terms

So the car was going limp while driving and getting stuck in gear and reduced engine and transmission error ? This is what I’m dealing with right now

That's the symptoms. When gear position sensor dies, gearbox CPU doesn't know what's going on, what gear the car in, and if gearshifts are performed correctly. So it let you drive in the selected gear in limp mode, and then won't let you drive at all.

Wonder if anyone in SoCal will open up and replace the part on my pdk I want my car back on the road

With the written fault codes the problem sounds like not working shift fork position sensor.

Just an update - 987 FL Boxster ZF 7DT 45FL They claim to sell rebuilt ones for about 1/2 of Porsche's price (and the Porsche one will also be rebuilt..) No personal experience and I hope not to have any personal experience.

@sk8Flyer did you resolve your problem at the end? My 997.2 PDK was throwing codes and wouldn't go into reverse, codes including a distance sensor failure code (P1734 the 4th shift rod sensor), I was convinced my distance sensor had failed. I got the car to a shop that has experience in replacing distance sensors the mechanic tried to clear the code but he said P1764 keeps coming back (similar to your case) and wouldn't reverse. Then he did a recalibration and it is now working properly. I'm in an awkward position because there is no shop near me that does sensor replacement, if the shop isn't far away I'd just take the car back and drive it see if the PDK act up again but since the shop is far away I'm worrying if I take the car back and the sensor error shows up again I'll have to go through the trouble of getting the car to the shop, live without the car for a period of time etc... should I just replace the distance sensor at this point even if the car is working after a calibration? I'm kinda curious about what P1764 could potentially point to, seems like there aren't a whole lot of cases involving P1764...