A new warning light on your dashboard? You don’t figure out why it doesn’t shut off… It’s typical, an auto is complex and there are various factors why a light may occur. If it turns out your glow plug light comes on while driving your Bmw Z4, it may possibly show some concerns. In this post, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Bmw Z4 functions, and then the different explanations it lights up when you are driving

glow-plug-light-bmw-z4

What is the goal of my Bmw Z4 glow plug light?

The main purpose of the engine glow plug light, which is most of the time represented by a yellow coil, is to ensure that your glow plugs are working correctly. In reality, it must light up when you switch on your Bmw Z4 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. Nevertheless, if it comes on while driving, it may indicate several failures, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Bmw Z4?

A glow light that comes on while driving on your Bmw Z4 or at any other time other than when the engine is started is designed to inform you to a problem other than your spark plugs, we will take a look at this now. No matter the reason, plug in your car to the diagnostic tool will allow you to properly translate the cause for the light up of your glow light.

My Bmw Z4 glow light comes on and I’m experiencing a loss of power

The first situation is that you notice that your glow plug light comes on while driving your Bmw Z4 and that you also experience a loss of power. In this instance, some concerns can describe its presence. Here is a list of the main factors:

  • Trouble 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 obvious that your preheat light comes on while driving on Bmw Z4 because it is one of the issue of which it is meant to alert you. Have the status of your valve inspected
  • Problem associated with 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 disturbance in the performance of the turbo.
  • Problem relevant 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 disturb its proper functioning.
  • Finally, the last issue that could lead to a glow indicator light on your Bmw Z4 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 Z4

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Bmw Z4 without you feeling any difference in power or motor vehicle behaviour. Generally, this is an electronic problem:

  • 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 fix the issue.
  • You have a false contact somewhere in your electrical circuit, test the other solutions 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

    • Whenever you have any further questions about the Bmw Z4, do not hesitate to consult our Bmw Z4 category.