Q: Hi i have an 09 kia rio and my check engine light is on and the motor shakes when idling and when going around 40 mph. What could

asked by on

The check engine light isnt flashing but its on, when you start the car you notice the engine shaking more than normal. I let it warm up about 30 minutes today before driving and it continued while braking, and when you get up to 40 m.p.h it gets worse

My car has 136000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. The check engine light is designed to stay on constantly when there is an issue. You should start by having the vehicle scanned for diagnostic troubleshooting codes. These are codes meant to help the owner or technician diagnose issues detected by the computer. When your check engine light illuminates, there is at least one code saved. This can be done by a technician or at most local automotive parts stores. Once you know the codes you can take appropriate corrective measures. The engine vibrates and idles rough when the combustion process in the engine is not steady and correct. This may be a spark, fuel, air, or sensor issue. The good thing is that the check engine light and the codes will point you in a direction where diagnosis will be easier.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Hi i have an 09 kia rio and my check engine light is on and the motor shakes when idling and when going around 40 mph. What could

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Hear knocking at bottom of engine

Unfortunately, there can be several different reasons that could duplicate the sound of a knock in the engine. With the information provided being limited, it is difficult to determine what the cause of the knock is. In a best case...

Q: Brake changes on my 2007 Kia Picanto

You may not need brakes but should get them inspected to see if they are worn down or just noisy. If you are having to replaced the brakes every 4000km or six months, then you have issues with the calipers...

Q: Q: Rain water getting into the car

The water leaking into your front floor is most likely coming from the sun roof. The sun roof has two water drains. Each drain runs next to the windshield, inside of the left and right side pillars, called the A...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.