A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s normal, a vehicle is complicated and there are multiple reasons why a light may occur. In the event that your glow plug light comes on while driving your Renault Scenic 2, it may possibly show several concerns. On this page, we will do anything we can to support you see things more clearly. First, we will find out how the preheating light on your Renault Scenic 2 operates, and then the different causes it lights up when you are driving

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What is the role of my Renault Scenic 2 glow plug light?

The main role of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to assure that your glow plugs are working correctly. In reality, it must light up when you switch on your Renault Scenic 2 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 meant to stay or come on while driving with your vehicle. But, if it comes on while driving, it may suggest 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 Scenic 2?

A glow light that comes on while driving on your Renault Scenic 2 or at any other time other than when the engine is started is designed to notify you to a problem 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 translate the cause for the light up of your glow light.

My Renault Scenic 2 glow light comes on and I’m experiencing a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Renault Scenic 2 and that you also experience a loss of power. In this case, several complications can demonstrate its presence. Here is a list of the most important reasons:

  • Trouble of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is blocked, in this instance, it is logical that your preheat light comes on while driving on Renault Scenic 2 because it is one of the problem of which it is designed to alert you. Have the status of your valve checked
  • Trouble 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 performance of the turbo.
  • Trouble linked to the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that disturb its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Renault Scenic 2 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 Scenic 2

Finally, we’ll give you the causes for a glow plug light that comes on on your Renault Scenic 2 without you feeling any difference in power or vehicle behaviour. Ordinarily, this is an electronic problem:

  • 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 fix the issue.
  • You have a false contact somewhere in your electrical circuit, check the other alternatives first because it is not easy to find it alone, we encourage you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you wish more guides on the Renault Scenic 2, go to our Renault Scenic 2 category.