I have suzuki cultus ags 2018 model. Suddenly i have face gear down shifting issue when speed go to 70 km/h it down shift gear from 5 D to 3 D and car make a accelerate sound if i continue accelerate than its don't down shit gear only 70 to 75 km/h speed it down shift the gear.
Can anyone reply please
You have an issue where the engine ecu is detecting cold temperature or wrong throttle position which maybe causing a wrong engine load to be detected.
Get it diagnosed by a proper educated mechanic.
Was facing the same issue, if you got solved do let me know