I have a VITZ 1999 model and been using it for quite a long time both on Petrol & CNG.
I have been facing this issue for like last 2,3 years now due to which i cant take my car on motorway. The issue is that suddenly O/D light starts blinking and when its blinking, car doesn't change the gear up to 5th, it keeps stuck in 4th and behaves like if O/D mode is working.
I have got it checked on a couple of computers but no error code was appeared and i am literally fed-up of the issue. Any help ?