A new warning light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, an automobile is complicated and there are various reasons why a light might occur. If your glow plug light comes on while driving your Kia Optima, it may suggest several issues. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Kia Optima functions, and then the different explanations it lights up when you are driving

glow-plug-light-kia-optima

What is the role of my Kia Optima glow plug light?

The primary intent of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to assure that your glow plugs are working correctly. In reality, it must light up when you switch on your Kia Optima to tell you that they are heating the intake air in your cylinders and must go out after a few minutes when the engine is running. This preheat light is therefore not supposed to stay or come on while driving with your car. But, if it comes on while driving, it may suggest several troubles, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Kia Optima?

A glow light that comes on while driving on your Kia Optima or at any other time other than when the engine is started is designed to notify you to a problem other than your spark plugs, we will look at this right now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to accurately translate the explanation for the light up of your glow light.

My Kia Optima glow light comes on and I’m suffering from a loss of power

The first possibility is that you perceive that your glow plug light comes on while driving your Kia Optima and that you also knowledge a loss of power. In this instance, several problems can demonstrate its lightning. Here is a list of the main reasons:

  • Issue of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is clogged, in such a case, it is logical that your preheat light comes on while driving on Kia Optima because it is one of the issue of which it is designed to notify you. Have the status of your valve checked out
  • Problem related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a disturbance in the operation of the turbo.
  • Problem relevant to the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that affect its proper performing.
  • Finally, the last issue that could lead to a glow indicator light on your Kia Optima coupled with a loss of power, is that your fuel filter is too dirty, you should feel jerks because of a bad fuel flow in the engine.

My glow plug light comes on or is flashing but no difference on the performance of my Kia Optima

Finally, we’ll give you the explanations for a glow plug light that comes on on your Kia Optima without you feeling any difference in power or car behaviour. Generally, this is an electronic problem:

  • Glow plug relays or fuses to be swapped out, test and replace if necessary.
  • A contactor/potentiometer on one of your pedals (brake, accelerator or clutch) has failed, often a simple de-seizure will be enough to fix the issue.
  • You have a false contact somewhere in your electrical circuit, test out the other options first because it is not easy to find it alone, we advise you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you need more guides on the Kia Optima, go to our Kia Optima category.