A new warning light on your dashboard? You don’t find out why it doesn’t switch off… It’s typical, an automobile is elaborate and there are many motives why a light could occur. In cases where your glow plug light comes on while driving your Renault Megane, it might show different issues. On this page, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Renault Megane operates, and then the different motives it lights up when you are driving

glow-plug-light-renault-megane

What is the goal of my Renault Megane glow plug light?

The main role of the engine glow plug light, which is generally represented by a yellow coil, is to ensure that your glow plugs are working effectively. In reality, it must light up when you switch on your Renault Megane 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 supposed to stay or come on while driving with your vehicle. However, if it comes on while driving, it may show several failures, we will try to summarize the main ones.

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

A glow light that comes on while driving on your Renault Megane 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 look at this right now. No matter the reason, plug in your car to the diagnostic tool will allow you to carefully translate the motive for the light up of your glow light.

My Renault Megane glow light comes on and I’m suffering from a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your Renault Megane and that you also encounter a loss of power. In this case, different trouble can describe its presence. Here is a list of the main motives:

  • Issue 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 Renault Megane because it is one of the problem of which it is expected to warn you. Have the status of your valve checked out
  • Trouble associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can lead to turbo boost and a disturbance in the operation of the turbo.
  • Trouble related to the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that affect its proper performance.
  • Finally, the last problem that could lead to a glow indicator light on your Renault Megane coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Megane

To conclude, we’ll give you the motives for a glow plug light that comes on on your Renault Megane without you feeling any difference in power or vehicle behaviour. Generally, this is an electronic problem:

  • 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 problem.
  • You have a false contact somewhere in your electrical circuit, check the other solutions first because it is not easy to find it alone, we suggest you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • To find more tips on the Renault Megane, take a look at the Renault Megane category.