?01 C4 - Road trip with p0740 code?

Hey all - I bought a 121k mile .1 C4 tip back in March. Beautiful car and really enjoy it, but it hasn�t been without some headache so far. after buying I took it to my local Indy and had them do a thorough P(ost)PI. All came back as expected, save for two CEL codes (one for cats going bad which not concerned about, and the P0740 - Torque Converter Solenoid). Indy said the trans code wasn�t something to worry about. Also took it back to the Indy about a month later for an oil change, and had a few other filters changed but all has been good. I�ve put about 1k miles on it so far and aside from the periodic CELs for the cats, it�s been relatively trouble free (save for a few instances of the car stalling upon warm start which should be fixed now with the new filters installed). I had the P0740 code come back last week, it read Torque Converter Clutch Circuit/Open. I cleared it and it hasn�t come back since. The car drives fine, shifts as normal and there is no change to the driving experience when it comes on. my question is should I feel comfortable taking this on a ~800 mile road trip? The trans code has me a little worried even if when it appears the driving experience is no different. could just chalk it up to being an old car, but the last thing I�d want is to get stranded on the side of the road halfway into this road trip with a blown transmission. any thoughts are welcome, thanks in advance.

Code P0740 means the Lock-up function in the Torque Converter is not functioning as expected... It is a chain reaction failure that starts with the wear in the bore of the valve body for the pressure regulator, then the pressure regulator sticks at times causing too much pressure, this excessive pressure when the lock-up solenoid triggers for lock-up blows a rubber o-ring in the Torque Converter ...Then the lock-up function works intermittently ( or not at all).. So basically a tiny valve sticks and blows a rubber o-ring..... The fix is a new valve body and Torque Converter... You can continue to drive it pretty much indefinitely with no other damage or chain reactions.....so go ahead on your 800 mile trip and just place your busseness card over the CEL...

@Porschetech3 awesome, very helpful thank you. any sense what that repair would cost? Assuming trans would have to be dropped, so would guess it�s several hours of labor + parts?

The labor is what is going to kill you.... You can check the parts prices at Pelican or Auto Atlanta ect...... Yes the trans will need to be removed to access the Torque Converter , the valve body if just remove the trans oil pan and filter and there it is ...

@Porschetech3 thanks, super helpful. So nothing really to be concerned about but eventually something I should probably get fixed. out of curiosity, are you a licensed tech? You clearly know a bunch about this specific situation haha. Wish my Indy was as knowledgeable, they couldn�t really tell me anything (and they are a Porsche specialist)

Am I Licensed ???.........You must live in Canada : ) .....in the US we don't have Auto Tech Licencing but I am a Certified Porsche Gold Meister, a Mitsubishi Master, and a FoMoCo Master , ASE Master ,with over 50+ years in Dealerships, plus 2 IHRA World Records + numerous Track Championships and Race Wins + Dirt Bike and Outboard 2-stoke Racing as a Teen since I was 12 years old.... Plus I spent 7 years as a VICA Judge and Certifying Tech Schools Plus won Regional FoMoCo Top Tech Awards for 7 years straight...and probably a few other accolades I have forgot about .....oh wait ...also an Honorary Doctorate from Rennlist ( Dr.h.c.Porschetech3 eg. Dr.h.c.F.Porsche ) ...lol

@Porschetech3 admittedly I�m pretty new to this whole world, clearly I have a lot of reading to do haha. I live in the northeast US. But thank you again, wish there was a way I could compensate you for the time/advice. Fun to talk to someone who is so knowledgeable.