Blinking light between Drive and 4th gear on a 986 Tiptronic

[tonythetiger]

Originally Posted by snottas

I was able to stop the lights from blinking (4th to D) and the irregular gear changes by minor adjustment of the cable at the switch or at the gear lever. This only temporarily fixed the problem as the next time I went to drive I had the same problem which again could be temporarily fixed by adjustment but with the same outcome until I changed the switch.
Note:- the original problem was the lights blinking which occurred each time I drove the vehicle.

im pretty sure mine is related to heat...never does it cold, starts up after driving, happens quicker in hot weather and the fans run incessantly. I have a thermo to check the tranny temp ready for next time I drive the car and Im going to get into the engine bay this weekend to poke around, plus replace the coolant vacuum valve thingy. I expect my fix is the internal harness, but not sure yet.

[KuaiThunder]

Hi guys,

In stead of opening new thread I would just continue on this one. I have replaced my Gear Selection Switch about 5 years ago when first time I have the flashing “4” & “P” (Not “D”). Early last year I have a flashing “4” & “D” with code P0740 and I able to just clear the code and continue driving without issue until two days ago.

This time I have flashing “4” & “D” again and the code is 0035 “Multi-function Switch”. I believe this code is from TCU not ECU. Anyobe know what is “Multi-Function Switch” is? Or better yet have the part number for it?

Thx
2001 Boxster S Tip with 100K KM