A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s normal, an automobile is complicated and there are multiple causes why a light might occur. If your glow plug light comes on while driving your BMW X4, it may suggest different problems. In the following paragraphs, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your BMW X4 functions, and then the different motives it lights up when you are driving

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What is the role of my BMW X4 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 properly. Indeed, it must light up when you switch on your BMW X4 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 supposed to stay or come on while driving with your motor vehicle. But, if it turns on while driving, it may reveal different failures, we will try to explain the most important ones.

What to do if the glow plug light comes on while driving on my BMW X4?

A glow light that comes on while driving on your BMW X4 or at any other time other than when the engine is started is meant to notify you to a problem other than your spark plugs, we will take a look at this now. Whatever the case, a switch to the diagnostic tool will allow you to carefully understand the reason for the light up of your glow light.

My BMW X4 glow light comes on and I’m going through a loss of power

The first probability is that you perceive that your glow plug light comes on while driving your BMW X4 and that you also encounter a loss of power. In this instance, different problems can explain its presence. Here is a list of the most important causes:

  • Problem of EGR valve, in fact, if you suffer a loss of power, it is possible that your EGR valve is blocked, in this case, it is logical that your preheat light comes on while driving on BMW X4 because it is one of the issue of which it is expected to warn you. Have the status of your valve checked out
  • Issue 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 perturbation in the performance of the turbo.
  • Issue associated with the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disrupt its proper performing.
  • Finally, the last issue that could lead to a glow indicator light on your BMW X4 coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 BMW X4

To finish , we’ll give you the motives for a glow plug light that comes on on your BMW X4 without you feeling any difference in power or motor vehicle behaviour. In most cases, this is an electronic problem:

  • Glow plug relays or fuses to be replaced, 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 resolve the issue.
  • You have a false contact somewhere in your electrical circuit, test out the other options first because it is not easy to find it alone, we advise you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • If you have any additional questions about the BMW X4, do not hesitate to consult our BMW X4 category.