A new warning light on your dashboard? You don’t find out why it doesn’t shut off… It’s normal, a vehicle is elaborate and there are many motives why a light may occur. In cases where your glow plug light comes on while driving your Renault Koleos, it might reveal different problems. In the following paragraphs, we will do anything we can to support you see things more clearly. First, we will see how the preheating light on your Renault Koleos functions, and then the different causes it lights up when you are driving

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What is the purpose of my Renault Koleos glow plug light?

The primary role of the engine glow plug light, which is generally represented by a yellow coil, is to assure that your glow plugs are working properly. In reality, it must light up when you switch on your Renault Koleos 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 car. But, if it turns on while driving, it may show multiple issues, we will try to point out the most important ones.

What to do if the glow plug light comes on while driving on my Renault Koleos?

A glow light that comes on while driving on your Renault Koleos 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. Whatever the case, a switch to the diagnostic tool will allow you to carefully interpret the reason for the light up of your glow light.

My Renault Koleos glow light comes on and I’m going through a loss of power

The first possibility is that you identify that your glow plug light comes on while driving your Renault Koleos and that you also knowledge a loss of power. In this case, different trouble can describe its presence. Here is a list of the most important motives:

  • Problem of EGR valve, indeed, if you go through a loss of power, it is possible that your EGR valve is blocked, in such a case, it is rational that your preheat light comes on while driving on Renault Koleos because it is one of the problem of which it is meant to notify you. Have the status of your valve examined
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can bring about turbo boost and a perturbation in the operation of the turbo.
  • Problem related 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 affect its proper functioning.
  • Finally, the last trouble that could lead to a glow indicator light on your Renault Koleos coupled with a loss of power, is that your fuel filter is too dirty, you should come to 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 Renault Koleos

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

  • Glow plug relays or fuses to be changed, 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 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 want more tutorials on the Renault Koleos, go to our Renault Koleos category.