I did have an occurrence of a Transmission Service Required message and the car went into limp mode - no codes when hooked up by a mechanic.
I don’t get any other lights or messages and no codes.
I will check the CEM connections

I have a 2002 V70 XC 2.5T that has 115000 miles on it. I purchased the car 2 months ago from a Volvo mechanic. It starts as it should when cold or sitting after driving - usually, More frequently though starting when warm has been rough - turning over, sometime not starting, the tach jumps to >3K rp...