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 December 20, 2016

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

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

What does it mean when the harmonic balancer wobbles?

Hi, thanks for writing in. When the harmonic balancer is wobbling, it would be best not to run the engine. The harmonic balancers function is to counteract the vibrations in the engine so damage doesn't occur. When it fails, it...

What cause a catilac converter in 2009 nessain murnao go bad

There can be a few different reasons for a catalytic converter to fail. Your engine running too rich or lean or coolant in exhaust from a blown head gasket can cause failure. Also a defective converter that breaks apart and...

Engine misfires and check engine light is always on

It’s always a good idea to pull over and turn off your vehicle when the check engine light is blinking. A blinking check engine light usually means there is a severe misfire in one or more of the cylinders. Most...

Related articles

P0289 OBD-II Trouble Code: Cylinder 10 Injector Circuit High
P0289 P0289 code definition The DTC P0289 code indicates that the number 10 cylinder is experiencing an above average amount of current at the fuel injector. What the P0289 code means Code P0289 means that the fuel injector circuit...
P2203 OBD-II Trouble Code: NOx Sensor Circuit High Input Bank 1
P2203 P2203 code definition NOx Sensor Circuit High Input Bank 1 What the P2203 code means This code indicates the NOx module is maintaining a high voltage to the NOx (Oxides of Nitrogen) sensor. What causes the P2203 code? This...
P0231 OBD-II Trouble Code: Fuel Pump Secondary Circuit Low
P0230 P0230 code definition Fuel Pump Primary Circuit Malfunction What the P0230 code means P0230 is a generic OBD-II code which indicates that the fuel pump primary circuit has a malfunction of the vehicle power to the fuel pump when...