A new light on your dashboard? You don’t figure out why it doesn’t shut off… It’s normal, a car is complex and there are many motives why a light might occur. In the event that your glow plug light comes on while driving your Subaru Forester, it may indicate some things. In this article, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Subaru Forester functions, and then the different motives it lights up when you are driving

glow-plug-light-subaru-forester

What is the goal of my Subaru Forester glow plug light?

The primary goal of the engine glow plug light, which is generally symbolized by a yellow coil, is to make sure that your glow plugs are working correctly. Indeed, it must light up when you switch on your Subaru Forester 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 turns on while driving, it may indicate several troubles, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Subaru Forester?

A glow light that comes on while driving on your Subaru Forester 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 look at this right now. Whatever the case, plug in your car to the diagnostic tool will allow you to accurately translate the motive for the light up of your glow light.

My Subaru Forester glow light comes on and I’m having a loss of power

The first situation is that you detect that your glow plug light comes on while driving your Subaru Forester and that you also experience a loss of power. In such a case, some concerns can demonstrate its presence. Here is a list of the main motives:

  • Problem of EGR valve, in reality, if you undergo a loss of power, it is possible that your EGR valve is clogged, in such a case, it is expected that your preheat light comes on while driving on Subaru Forester because it is one of the issue of which it is supposed to alert you. Have the status of your valve looked at
  • Problem linked 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 related 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 disrupt its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Subaru Forester coupled with a loss of power, is that your fuel filter is too dirty, you should feel 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 Subaru Forester

To finish , we’ll give you the motives for a glow plug light that comes on on your Subaru Forester without you feeling any difference in power or vehicle behaviour. In general, this is an electronic fault:

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

    • If perhaps you have any additional questions about the Subaru Forester, do not hesitate to consult our Subaru Forester category.