A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s typical, a vehicle is elaborate and there are multiple motives why a light might occur. In cases where your glow plug light comes on while driving your Renault Grand Scenic 4, it might point out several concerns. 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 Grand Scenic 4 works, and then the different causes it lights up when you are driving

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What is the purpose of my Renault Grand Scenic 4 glow plug light?

The primary role 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 properly. In fact, it must light up when you switch on your Renault Grand Scenic 4 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 meant to stay or come on while driving with your car. However, if it comes on while driving, it may indicate several failures, 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 Grand Scenic 4?

A glow light that comes on while driving on your Renault Grand Scenic 4 or at any other time other than when the engine is started is designed to inform 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 accurately interpret the cause for the light up of your glow light.

My Renault Grand Scenic 4 glow light comes on and I’m having a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Renault Grand Scenic 4 and that you also experience a loss of power. In this instance, several problems can explain its presence. Here is a list of the most important motives:

  • 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 rational that your preheat light comes on while driving on Renault Grand Scenic 4 because it is one of the problem of which it is expected to warn you. Have the status of your valve tested
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a disturbance in the operation of the turbo.
  • Trouble relevant to 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 performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Renault Grand Scenic 4 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 Grand Scenic 4

To finish , we’ll give you the causes for a glow plug light that comes on on your Renault Grand Scenic 4 without you feeling any difference in power or car behaviour. Generally, this is an electronic problem:

  • 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 resolve the trouble.
  • You have a false contact somewhere in your electrical circuit, check the other options first because it is not easy to find it alone, we advise you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If perhaps you have any further questions about the Renault Grand Scenic 4, do not hesitate to consult our Renault Grand Scenic 4 category.