A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, an automobile is complicated and there are various causes why a light might occur. If your glow plug light comes on while driving your Opel Zafira, it may reveal several concerns. In the following paragraphs, we will do everything we can to help you see things more clearly. First, we will discover how the preheating light on your Opel Zafira operates, and then the different motives it lights up when you are driving

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What is the role of my Opel Zafira glow plug light?

The primary goal of the engine glow plug light, which is generally represented by a yellow coil, is to guarantee that your glow plugs are working properly. Indeed, it must light up when you switch on your Opel Zafira 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 comes on while driving, it may suggest several issues, we will try to summarize the most important ones.

What to do if the glow plug light comes on while driving on my Opel Zafira?

A glow light that comes on while driving on your Opel Zafira or at any other time other than when the engine is started is intended to alert you to a problem 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 carefully interpret the motive for the light up of your glow light.

My Opel Zafira glow light comes on and I’m encountering a loss of power

The first possibility is that you notice that your glow plug light comes on while driving your Opel Zafira and that you also encounter a loss of power. In this case, several trouble can demonstrate its lightning. Here is a list of the most important causes:

  • Issue of EGR valve, in fact, if you go through a loss of power, it is possible that your EGR valve is blocked, in this instance, it is obvious that your preheat light comes on while driving on Opel Zafira because it is one of the problem of which it is supposed to warn you. Have the status of your valve checked
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can lead to turbo boost and a perturbation in the performance of the turbo.
  • Problem linked to the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disturb its proper operation.
  • Finally, the last trouble that could lead to a glow indicator light on your Opel Zafira 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 Opel Zafira

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

  • Glow plug relays or fuses to be swapped out, 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 fix the trouble.
  • 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 suggest you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error
  • To discover more tips on the Opel Zafira, take a look at the Opel Zafira category.