A new light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, an automobile is elaborate and there are various causes why a light may occur. If your glow plug light comes on while driving your Hyundai Sonata, it may signify some things. On this page, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Hyundai Sonata operates, and then the different explanations it lights up when you are driving

glow-plug-light-hyundai-sonata

What is the purpose of my Hyundai Sonata glow plug light?

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

What to do if the glow plug light comes on while driving on my Hyundai Sonata?

A glow light that comes on while driving on your Hyundai Sonata or at any other time other than when the engine is started is intended to warn you to a fault other than your spark plugs, we will take a look at this right now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to precisely translate the motive for the light up of your glow light.

My Hyundai Sonata glow light comes on and I’m encountering a loss of power

The first possibility is that you detect that your glow plug light comes on while driving your Hyundai Sonata and that you also experience a loss of power. In this case, some trouble can explain its lightning. Here is a list of the main causes:

  • Problem of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is blocked, in this instance, it is obvious that your preheat light comes on while driving on Hyundai Sonata because it is one of the problem of which it is meant to warn you. Have the status of your valve inspected
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can bring about turbo boost and a perturbation in the operation of the turbo.
  • Problem associated with the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disturb its proper performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Hyundai Sonata coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Hyundai Sonata

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Hyundai Sonata without you feeling any difference in power or automobile behaviour. Generally, this is an electronic fault:

  • Glow plug relays or fuses to be swapped out, test and change 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 trouble.
  • 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 suggest you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you have any further questions about the Hyundai Sonata, do not hesitate to consult our Hyundai Sonata category.