Transmission, codes P1731 and P1732

Hi Ken, actually I made the can test while right now nothing useful because I removed the transmission plug from down took it inside the car to test the voltage. So you will find a lot of faults which mean if I fix the plug back the only shift rods faults will stay.
Anyway I uploaded the pictures.

Hi Steve, I replaced the PDK control unit from the agency and I made the programming and I made the flashing also while this is not the first time
I finished almost 5 cars same model by flashing the match part number but that time there was no shift rods fault
Only the calibration not complete because of invalid data but here we can not start the calibration!
Last thing which I noticed that each shift rods should be 5v but here only 2.2v from the control unit.
I don’t know.

I checked it all and everything was fine.
I am just searching now the wiring between the gateway, selector and cluster nothing more I can do because I can’t understand why the control giving low voltage.

Normal it's giving 13.5 to 14 from the battery to the control.

Dear Ken,

Here’s the can scan.
But you will find some errors it must not be only because I removed some wires from inside.

Dear Steve,

It’s giving the same voltage!
Guys thanks for your help appreciate it.
I really want to end this issue so please try your best.

Hi Steve,

I will give the car back to the customer because I realized that he didn’t not replace the transmission only the valve body
and as the agency told me that they got the same issue and in the end they replaced the transmission.
So nothing I can do more.

Hello Guys, my 991.1 C2S encountered similar issues.

First incident, the PDK transmission wont engage to any gear. Fault Code P0700 and P1732 only. An outsider tech advised me to replace the PDK Distance Sensor from https://t-design9.com/porsche_PDK_displacement_distance_gear_position_sensor.html, then the shop calibrated it using the updated PIWIS. The car was running good again but after 40 kms drive, the problem came back. Car had to be towed back to the shop.

2nd Incident, more Fault Codes, 00A005, 00A016, C12003, C12004, C12082, P0700, U0101, P1745, P1767, P1771, P18B4, P17F1, P1736, P1738.
Now the shop advised me to replace the Transmission Control Unit. We are about to order it soon.

May I know if we are on the correct path?

Thank you

Porsche Panamera Uses ZF Transmission, for P1731, P1732, P1733, P1734 fault codes not required to replace gearbox (PDK) or transmission control unit, Just simply replace following part:

- Sensor Pack (Position Sensor with Speed and Temperature Sensors)
- Part#: 97031708500, Estimated Price is 500 USD.

But before any replacement, make sure your battery life is good, because Porsche is one of the most sensitive cars to over/under voltage situations. So much technology is packed into them, that bad or going battery can and does make funny things with totally unrelated systems.
Everything in the car is controlled by microprocessors and when the voltages get low you get weird signals that can be misinterpreted by the other processors.
If not worked, then try to replace with above sensor pack.