Hi,
I have the same problem with my 2012 GX LC200. On solid and cannot clear, 1 to 4 th ok but no 5 or 6th. Cruise control not working also. Have not changed the accelerator pedal sensor yet as would expect an error code and check light if this was the problem and not getting either! Had the auto transmission checked today and valve body and actuators working fine so definitely external to the box, getting the rest checked Monday but running out of ideas. Hard to isolate without any error codes coming up. Any help would be appreciated.
cheers,
Richard. Gold Coast.
!