P0600
 

OK so after months of searching for a rain leak. Stripping the dash and heater box out to repair it. Putting it all back meticulously, I now have a fault. I have started the car probably 5 or 6 times since it all went back together with absolutely no problems, then today while making room for a much older project , I left the porsche running and she suddenly stopped. Everything lights up OK, I can hear pumps running but she will not turn over at all. NOTHING. Obd 2 shows a code of p0600 which when Google comes up as an ECU problem but other than that, I do not have a clue.
Any help would be appreciated.

P0600 is for a CAN bus time out due to an implausible signal. Usually, this happens with an improperly plugged in connector in the wiring harness.

OK so what sort of connection. I have removed and reconnected. Heater box connection with all work, heater control and radio connections, which all work. Instrument connection which all work air bag connections and tiptronic connection within the steering wheel. The tiptronic worked when tested.

I am struggling with something similar.
imho - get Durametric, post the results.Otherwise it is just a WAG
I say Post the results because even 'experienced' non-Pcar people may not understand the significance of the Durametric words.
It may be better to find an Indie who is a PIWIS nerd.

Depending upon the year of the car, the CAN Bus connects to a variety of areas of the dash. The later the car, the more bus connections, including the Tiptronic control system, which includes the buttons on the steering wheel and the Tip control module itself.

As you have had things apart, you need to go back over every connection touched. Without a Porsche specific diagnostic system, you are left with a process of elimination.