A new light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, a car is complicated and there are many causes why a light may occur. In cases where your glow plug light comes on while driving your Renault Laguna 3, it may possibly signal some things. In this article, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Renault Laguna 3 operates, and then the different motives it lights up when you are driving

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What is the role of my Renault Laguna 3 glow plug light?

The main role of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to make sure that your glow plugs are working effectively. In reality, it must light up when you switch on your Renault Laguna 3 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 car. But, if it comes on while driving, it may indicate different troubles, we will try to summarize the most important ones.

What to do if the glow plug light comes on while driving on my Renault Laguna 3?

A glow light that comes on while driving on your Renault Laguna 3 or at any other time other than when the engine is started is meant to inform you to a fault other than your spark plugs, we will take a look at this right now. In any case, connecting your vehicle to the diagnostic tool will allow you to accurately interpret the motive for the light up of your glow light.

My Renault Laguna 3 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 Renault Laguna 3 and that you also experience a loss of power. In this instance, some trouble can demonstrate its lightning. Here is a list of the most important causes:

  • 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 logical that your preheat light comes on while driving on Renault Laguna 3 because it is one of the failures of which it is supposed to alert you. Have the status of your valve tested
  • Issue 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 disturbance in the operation of the turbo.
  • Issue in connection with the injection, either an injector that has seized up or the injection pump that is malfunctioned 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 Laguna 3 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 Renault Laguna 3

To conclude, we’ll give you the motives for a glow plug light that comes on on your Renault Laguna 3 without you feeling any difference in power or car behaviour. Ordinarily, this is an electronic fault:

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

    • If you need more tutorials on the Renault Laguna 3, go to our Renault Laguna 3 category.