The check engine light came on in my wifes Kia so she took it to a garage who told her problem is 'System Too Lean' and 'Solenoid Valve is stuck on'. My wife said they didn't replace anything just used WD-40 and minipulated the valve then the light went off.
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Re: Kia Sportage 2003 - Solenoid Valve
This sounds like the idle air control valve. This valve sits on the inlet manifold and basicly regulated the flow of air for tickover( or idle). The usual operation of this valve is, when the engine is running at high speed the valve will be closed, when the engine comes down to idle, the main throttle butterfly will shut as you lift your foot off the pedal. The idle valve will open and give a small amound of air to the engine, just enough to run it at idle speed. These valves can stick open, therefore letting air in when the throttle is open, giving the engine too much air. WD40 is only a temporary repair untill it jams again. Best course of action is to have part replaced.
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The most common problem that causes what you are experiencing is a plugged exhaust system.Usually the catalytic converter.The check engine light light should be on and the codes will lead to an oxygen sensor out of range,causing the fuel to lean out.If this is the case then i would look at getting the converter replaced.You could also have a vacuum leak which may or may not put the check engine light on.Let me know how you make out.
I would disconnect the battery for three minutes and reconnect it. That should remove the code. You will have drive the car up to about 75 miles to see if the code does or does not show up again. It may have been reading the amount of air in the system from removal of the injector.
I have 2005 Kia Sportage with a check engine light. No other symptoms. I was told by Kia and Local mechanic that it is the fuel injectors. Error Code states that Fuel injectors are running lean. Put Master airflow- no change. Ran engine test with propane to run rich and trim never changed from 15. Car runs great. Kia dealer said that this is because we use Ethel in gas that it effects the alumium fuel rail delivery to the injectors and that it is necessary to change all of them .Kia Dealer wants $1,000.00 deposit to place order 6 fuel injectors from Kia. (Has anyone heard of that?)Also put fuel injector cleaner in tank.Does anyone have any suggestions before I spend over $1,000.00 to replace all 6 injectors or possible idea of what could be wrong?
Take this car to a shop that has a device to read the car's computer codes. This will probably explain the problem. If this does not, take it to a shop where they have a vacuum gauge and know how to use it.
Fix the leak at the emissions system first. There is a small leak that the PCU detected. That could be the cause of the P0116 problem. Also the PCU detected a lean gas mixture because it is getting more air to the fuel system than gasoline. Start with the leak , then the Engine temperature sensor. I think that fixing the lek will "fix' the othe 2 problems. but it could be either one or all of them.
\I WAS HAVING THE SAME PROBLEM, IF THE CHECK ENGINE LIGHT DOES NOT COME ON, IT COULD BE A CLOGGED CATALETIC CONVERTER, THE EASIEST WAY TO TEST THIS ,TO ME ANYWAY, IS TO DISCONNECT THE EXHAUST PIPES(COMING OFF THE ENGINE) AND THE CONNECTION TO THE FRONT OF THE CATALETIC CONVERTER, THEN START THE CAR AND SEE WHAT IT DOES, IF THE ENGINE SURGE GOES AWAY(REMEMBER THE CAR WILL BE LOUD) BUT YOU ARE LOOKING FOR THE ENGINE HEALTH TO GO TO NORMAL, IF IT DOES YOUR CAT IS CLOGGED
Ok I think you meant code P0171, this means the fuel trim is always lean, you need to check for a engine vacum leak, maybe a cut or damaged PCV hose or any other hose that is in the vaccum system, I have read other Kia owners (Kia Forums, you should join one) reports of this same code, most found it not to be the O2 sensor but a vacuum leak.