Idle trouble in a yaris

Updated July 20, 2017

The Toyota Yaris is a subcompact car that has been on the market since 1999. The Yaris is a fuel-efficient vehicle and boasts an economical 1.5-litre, four-cylinder engine. Users often report engine problems while the engine is on and the vehicle is not in motion, otherwise known as idling.

Rough Idling

When stopped at a red light or stop sign, drivers can encounter rough idling. This means that the vehicle is not idling smoothly. The car's revolutions per minute fluctuate, creating a jerky movement in the engine. The jerking movement may be observed in the feel of the accelerator or the entire vehicle.


Another common trouble with an idling Yaris occurs when accessories are on. Headlights, fog lights, air conditioning and heater use increase rough and uneasy idling.

Initial Acceleration

When the vehicle is idling and the driver initially releases the brake, a rough jerking motion may be felt in the engine and noticed in the car's initial movements. The RPMs increase rapidly and then level off to normal levels.


The Yaris runs very lean because the engine is so small and efficient. This means the engine uses as little gasoline and oil as possible. In 2006, Toyota recalled many vehicles in the United States, including the Yaris, because of a faulty part. This defective part causes the vehicles to leak oil and stall out or turn off completely.

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About the Author

Based in the Philadelphia area, Rachel Costello has been a freelance writer since 2008. Her areas of expertise include philosophy, literature, education, food and wine. Costello has worked for several marketing companies and her articles have been hosted by many blogs and websites. She received her Bachelor of Arts in English from Rutgers University and graduated as a distinguished Paul Robeson scholar.