A new light on your dashboard? You don’t find out why it doesn’t shut off… It’s typical, a vehicle is complicated and there are many factors why a light could come on. If it turns out your glow plug light comes on while driving your Subaru Outback, it may possibly suggest different problems. 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 Outback operates, and then the different motives it lights up when you are driving

glow-plug-light-subaru-outback

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

The main role of the engine glow plug light, which is in most cases represented by a yellow coil, is to make sure that your glow plugs are working properly. Indeed, it must light up when you switch on your Subaru Outback 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 vehicle. Nevertheless, if it comes on while driving, it may show different troubles, we will try to explain the main ones.

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

A glow light that comes on while driving on your Subaru Outback or at any other time other than when the engine is started is meant to notify you to a fault other than your spark plugs, we will look at this now. In any case, a switch to the diagnostic tool will allow you to precisely interpret the reason for the light up of your glow light.

My Subaru Outback 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 Subaru Outback and that you also knowledge a loss of power. In this case, different problems can explain its presence. Here is a list of the main factors:

  • Problem of EGR valve, in reality, if you undergo 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 Subaru Outback because it is one of the problem of which it is supposed to alert you. Have the status of your valve tested
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can bring about turbo boost and a disturbance in the operation of the turbo.
  • Trouble associated with 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 operation.
  • Finally, the last issue that could lead to a glow indicator light on your Subaru Outback 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 Subaru Outback

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

  • 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 get rid of the issue.
  • 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 advise you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you wish more guides on the Subaru Outback, go to our Subaru Outback category.