A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, an auto is complicated and there are many factors why a light could occur. If it turns out your glow plug light comes on while driving your Land Rover Discovery Sport, it might reveal some issues. In this post, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your Land Rover Discovery Sport functions, and then the different motives it lights up when you are driving

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What is the role of my Land Rover Discovery Sport glow plug light?

The main intent of the engine glow plug light, which is generally represented by a yellow coil, is to ensure that your glow plugs are working properly. In reality, it must light up when you switch on your Land Rover Discovery Sport 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 motor vehicle. But, if it comes on while driving, it may indicate multiple failures, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Land Rover Discovery Sport?

A glow light that comes on while driving on your Land Rover Discovery Sport or at any other time other than when the engine is started is meant to warn you to a fault other than your spark plugs, we will check out this now. In any case, a switch to the diagnostic tool will allow you to precisely interpret the motive for the light up of your glow light.

My Land Rover Discovery Sport glow light comes on and I’m having a loss of power

The first possibility is that you detect that your glow plug light comes on while driving your Land Rover Discovery Sport and that you also knowledge a loss of power. In such a case, some trouble can describe its lightning. Here is a list of the main factors:

  • Issue of EGR valve, indeed, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this case, it is obvious that your preheat light comes on while driving on Land Rover Discovery Sport because it is one of the problem of which it is designed to warn you. Have the status of your valve inspected
  • Problem related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a disturbance in the performance of the turbo.
  • Problem linked 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 disrupt its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Land Rover Discovery Sport coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 Land Rover Discovery Sport

Finally, we’ll give you the motives for a glow plug light that comes on on your Land Rover Discovery Sport without you feeling any difference in power or motor vehicle behaviour. In general, 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 issue.
  • You have a false contact somewhere in your electrical circuit, test the other options first because it is not easy to find it alone, we advise you to go to your technician.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any further questions about the Land Rover Discovery Sport, do not hesitate to consult our Land Rover Discovery Sport category.