The transmission 'gear' light is truly intermittent. I can start the car with the light being out then drive it hard with aggressive shifting and the light may not come on until later or it might come on during the aggressive driving. There seems to be no rhyme or reason. The HPU was replaced by a local transmission shop just before I bought the car after about 3 months the light started coming back on and the previous owner was tired of putting money in it and sold it to me. I am just not sure why my Techstream is not able to diagnose the issue. One other question I have is can you go to 'Help' > 'DLC3 cable check' and get 'all green' on your OBD2 pins?Techstream remembers my car whenever it’s connected. Not sure about your other questions.
Have you replaced the smt fluid and filled to the correct level? I’m suspicious of the hydraulic pressure being generated. Cycle times (run times) can help determine if that’s an issue. Also, see if excessive shifting in short time periods, brings on the gear light. Then see if the gear light goes away when reducing shifting maneuvers or stop shifting all together to allow the pump to build pressure again.
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