A new warning light on your dashboard? You don’t understand why it doesn’t shut off… It’s typical, an automobile is complex and there are many factors why a light might occur. If it turns out your glow plug light comes on while driving your Isuzu D-Max, it may possibly point out some concerns. In this post, we will do anything we can to support you see things more clearly. First, we will find out how the preheating light on your Isuzu D-Max operates, and then the different causes it lights up when you are driving

glow-plug-light-isuzu-d-max

What is the goal of my Isuzu D-Max glow plug light?

The primary purpose of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to guarantee that your glow plugs are working effectively. In fact, it must light up when you switch on your Isuzu D-Max 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 meant to stay or come on while driving with your automobile. But, if it turns on while driving, it may reveal different failures, we will try to summarize the most important ones.

What to do if the glow plug light comes on while driving on my Isuzu D-Max?

A glow light that comes on while driving on your Isuzu D-Max or at any other time other than when the engine is started is designed to alert you to a fault other than your spark plugs, we will take a look at this right now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to precisely interpret the reason for the light up of your glow light.

My Isuzu D-Max glow light comes on and I’m experiencing a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Isuzu D-Max and that you also encounter a loss of power. In such a case, some problems can explain its presence. Here is a list of the most important factors:

  • Trouble of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is blocked, in this instance, it is logical that your preheat light comes on while driving on Isuzu D-Max because it is one of the issue of which it is designed to warn you. Have the status of your valve tested
  • Problem related 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 linked to the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that disturb its proper performing.
  • Finally, the last issue that could lead to a glow indicator light on your Isuzu D-Max coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 Isuzu D-Max

To conclude, we’ll give you the causes for a glow plug light that comes on on your Isuzu D-Max without you feeling any difference in power or automobile behaviour. In most cases, this is an electronic fault:

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

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