code 42 fuel temp circuit? what do i do?

[z32partsmo]

I haved been having serious problems car runs awesome until 10 minutes after reaches operating temp then stops. I can crank and crank engine over and nothing. Wait for an hour or two and then it will start and do the same thing over again. I replaced ptu coil packs and plugs. I wasnt getting any engine light on so I didnt check the ecu till today. I noticed it was in diagnostic mode so I guess that is why the engine light wasn't on. I had an extra ecu so I replaced it and I turned key to on position turned pot on ecu tottally clockwise waited 2 seconds tghen turnned it tottally counter clockwise I gott 2 flasshes then pause then 4 slow flashes and 2 fast flashes. what do the firstr to flashes mean? was that indicating that its in diagnostic mode? or is that code 11 CAS circuit? what do I do now please help.

[Zwicked]

That would be 24 and code 24 does not exist.

Run through this exercise and try again to see which code it is.

http://www.ttzd.com/tech/diagnostictech.html

Running until warm and dying is typical of a bad PTU.Is yours the old silver finned type or the newer black flat style?

[z32partsmo]

I have replaced the ptu twice thinking it was the problem and it still does not fix it. I will run codes again and let you know what happens.