A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s normal, an auto is elaborate and there are various causes why a light could come on. If it turns out your glow plug light comes on while driving your Bmw Serie 7, it might reveal some issues. On this page, we will do anything we can to help you see things more clearly. First, we will find out how the preheating light on your Bmw Serie 7 works, and then the different explanations it lights up when you are driving

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What is the role of my Bmw Serie 7 glow plug light?

The primary intent of the engine glow plug light, which is most of the time represented by a yellow coil, is to guarantee that your glow plugs are working correctly. In reality, it must light up when you switch on your Bmw Serie 7 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 meant to stay or come on while driving with your car. Nevertheless, if it turns on while driving, it may reveal several issues, we will try to explain the main ones.

What to do if the glow plug light comes on while driving on my Bmw Serie 7?

A glow light that comes on while driving on your Bmw Serie 7 or at any other time other than when the engine is started is intended to notify you to a fault other than your spark plugs, we will check out this now. Whatever the case, plug in your car to the diagnostic tool will allow you to precisely interpret the reason for the light up of your glow light.

My Bmw Serie 7 glow light comes on and I’m going through a loss of power

The first possibility is that you detect that your glow plug light comes on while driving your Bmw Serie 7 and that you also encounter a loss of power. In such a case, some complications can describe its presence. Here is a list of the main causes:

  • Trouble of EGR valve, in reality, if you are affected 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 Serie 7 because it is one of the issue of which it is intended to alert you. Have the status of your valve checked
  • Issue linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can lead to turbo boost and a disturbance in the performance of the turbo.
  • Issue 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 affect its proper function.
  • Finally, the last trouble that could lead to a glow indicator light on your Bmw Serie 7 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 Bmw Serie 7

To finish , we’ll give you the explanations for a glow plug light that comes on on your Bmw Serie 7 without you feeling any difference in power or car behaviour. In general, this is an electronic fault:

  • 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 solve the trouble.
  • 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 recommend you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any additional questions about the Bmw Serie 7, do not hesitate to consult our Bmw Serie 7 category.