I have an issue with my Tiptronic (ZF). Not sure if this is heat related because somehow it appears typically in hot - ~30C/80F - weather - could be just a coincidence.
What is happening that I get that flashing light show on Tip dash. So it means that there's an issue but Tip itself is working fine - no limp mode etc.

Well, if that reader reads that code correctly t's a hex 93 - couldn't find anything for that ZF 5hp gearbox - there's some info online but looks like it's for another ZF gearbox so it's not helpful

Oil temperature in Tip was around 93-97c - looks normal or ? - what kind of temp levels do you typically see in warm/hot climate - if you have happened to measure that. I think that should be within normal operational temperature but would be nice if someone could confirm that.

Any ideas what is that 93 error code?

 

Hmm.. .that seems to "Coolant Shutoff Valve" P1656

 

There is a solenoid and valve (and vacuum line) for the transmission cooler, opens to let coolent flow to the radiator that failed on my tip ( merc). That code sounds familiar, I'll have to check tomorrow. I did have the problem exhibit a different characteristic, tho. I replaced the valve and solenoid and fixed my problem.

 

Thanks - I quickly tested that shutoff valve and it seems be be quiet so probably it needs to be replaced. Ironically when the weather is really warm here in Finland my car exhibits these issues - hopefully I'll get that part asap as I doubt this ~30c weather stays here for a long and my 996 is a Cab...

Anyways - would be happy if someone could confirm what the normal operational temp for that ZF 5HP gearbox is - I read somewhere that it might be between 80-100c but that was not from a "official source".