Changing gears
* Worn or dirty transmission parts
*Faulty throttle position sensor
* Faulty gear selector position sensor
*Low transmission fluid level
Speeding up or slowing down
* Worn engine or transmission mounts
* Faulty spark plugs or ignition coils
* Clogged fuel filter
* Faulty mass air flow sensor
Braking
* Worn brake pads or rotors
* Stuck or faulty brake caliper
* Unadjusted parking brake cable
Idling
* Faulty idle speed sensor
* Clogged intake or exhaust system
* Faulty Exhaust Gas Recirculation (EGR) valve
*Low fuel level
Other reasons
* Faulty electronic transmission control unit (TCU)
* General electrical fault, such as a bad battery or alternator