A new light on your dashboard? You don’t find out why it doesn’t switch off… It’s normal, an auto is complicated and there are multiple factors why a light could occur. In the event that your glow plug light comes on while driving your Lexus ES, it may possibly signify different concerns. In this post, we will do everything we can to support you see things more clearly. First, we will discover how the preheating light on your Lexus ES operates, and then the different motives it lights up when you are driving

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What is the goal of my Lexus ES glow plug light?

The primary purpose of the engine glow plug light, which is most of the time represented by a yellow coil, is to make sure that your glow plugs are working correctly. In reality, it must light up when you switch on your Lexus ES 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 expected to stay or come on while driving with your automobile. Nevertheless, if it turns on while driving, it may suggest several troubles, we will try to point out the main ones.

What to do if the glow plug light comes on while driving on my Lexus ES?

A glow light that comes on while driving on your Lexus ES or at any other time other than when the engine is started is intended to inform you to a problem other than your spark plugs, we will take a look at this now. Whatever the case, plug in your car to the diagnostic tool will allow you to accurately translate the cause for the light up of your glow light.

My Lexus ES glow light comes on and I’m going through a loss of power

The first possibility is that you recognize that your glow plug light comes on while driving your Lexus ES and that you also encounter a loss of power. In this instance, different concerns can explain its lightning. Here is a list of the main factors:

  • Problem of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this case, it is logical that your preheat light comes on while driving on Lexus ES because it is one of the issue of which it is supposed to notify you. Have the status of your valve tested
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a perturbation in the performance of the turbo.
  • Problem relevant to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disrupt its proper functioning.
  • Finally, the last issue that could lead to a glow indicator light on your Lexus ES 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 Lexus ES

To finish , we’ll give you the motives for a glow plug light that comes on on your Lexus ES without you feeling any difference in power or automobile behaviour. In most cases, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 get rid of the issue.
  • You have a false contact somewhere in your electrical circuit, test the other solutions first because it is not easy to find it alone, we advise you to go to your technician.
  • Faulty injection pressure sensor, ECU error

    • If you need more guides on the Lexus ES, go to our Lexus ES category.