First step is to have it checked for trouble codes. If the check engine light is on, the pcm has detected a fault and set a code.
Bad motor mounts and needs a tune up probably
You might have a broken or worn transmission/engine mount.
The answer is on page 11 in the owner's manual ( "Light is blinking" ). Engine is misfiring, bring it to a garage as soon as possible.
The energy being released in the engine is not transferred to the outside; it manifests as vibration, which is transferred to the rest of the vehicle, hence the shaking of the car.
Anywhere buddy
possible warped brake pads or warped rotor Shaking while stopped, can be caused by broken motor mount, or engine miss.
It's engine is probably on.
My voyager started wobbling/shaking when accelerating at around 35 - 45 mph. It was the cv joints. It only does it under acceleration. It was a wobble from side to side.
it could be your engine mounts are needing replaced
You oil pump is not working?
Have your motor mount checked.
If the motor is shaking in your Kia Sephia, you probably have loose motor mounts. Simply tightening these up will stop the engine from shaking and vibrating.