A new warning light on your dashboard? You don’t figure out why it doesn’t turn off… It’s normal, an automobile is complex and there are various reasons why a light could occur. In the event that your glow plug light comes on while driving your Porsche Macan, it may signal some problems. In the following paragraphs, we will do everything we can to support you see things more clearly. First, we will discover how the preheating light on your Porsche Macan functions, and then the different reasons it lights up when you are driving

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What is the role of my Porsche Macan glow plug light?

The main purpose of the engine glow plug light, which is generally symbolized by a yellow coil, is to ensure that your glow plugs are working effectively. Indeed, it must light up when you switch on your Porsche Macan 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 expected to stay or come on while driving with your vehicle. But, if it turns on while driving, it may indicate several troubles, we will try to detail the main ones.

What to do if the glow plug light comes on while driving on my Porsche Macan?

A glow light that comes on while driving on your Porsche Macan or at any other time other than when the engine is started is designed to alert you to a problem other than your spark plugs, we will take a look at this right now. No matter the reason, plug in your car to the diagnostic tool will allow you to carefully interpret the reason for the light up of your glow light.

My Porsche Macan 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 Porsche Macan and that you also knowledge a loss of power. In this case, some trouble can describe its presence. Here is a list of the main reasons:

  • Trouble of EGR valve, indeed, if you undergo 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 Porsche Macan because it is one of the problem of which it is intended to alert you. Have the status of your valve inspected
  • Problem related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can lead to 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 disrupt its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Porsche Macan 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 Porsche Macan

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

  • Glow plug relays or fuses to be replaced, 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 out the other solutions first because it is not easy to find it alone, we recommend you to go to your technician.
  • Faulty injection pressure sensor, ECU error

    • If you want more guides on the Porsche Macan, go to our Porsche Macan category.