Hello,
I am a bit confused and would like to ask for advice. Looks like my Alphard 3.0 AWD 2006 have stopped shifting to 5th gear. There is no special event that have lead to that.
I just saw that the RPMs are unusually high say 3300rpm at 70mph. Then I made a small experiment driving with 70mph and puting the gear stick to D and then to 4. There was no change in the RPM whatsoever which looks like 5th gear is not engaged even in high RPM.
I went to a garage and they detected an error "P0793 Intermediate Shaft Speed Senson 'A' Circuit No Signal" But they said they are not very familiar with Alphard being Japanese Import and cannot help much.
Do you think 3300rpm at 70mph is normal and how to approach the problem?
Thanks in advance!
Lucho