A new warning light on your dashboard? You don’t understand why it doesn’t switch off… It’s normal, an automobile is elaborate and there are multiple causes why a light might occur. In the event that your glow plug light comes on while driving your Vauxkhall Astra, it may possibly reveal some problems. In the following paragraphs, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your Vauxkhall Astra operates, and then the different motives it lights up when you are driving

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What is the goal of my Vauxkhall Astra glow plug light?

The main intent of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to guarantee that your glow plugs are working effectively. In reality, it must light up when you switch on your Vauxkhall Astra 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. Nevertheless, if it comes on while driving, it may suggest multiple troubles, we will try to point out the most important ones.

What to do if the glow plug light comes on while driving on my Vauxkhall Astra?

A glow light that comes on while driving on your Vauxkhall Astra or at any other time other than when the engine is started is meant to warn you to a problem other than your spark plugs, we will look at this right now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to precisely interpret the cause for the light up of your glow light.

My Vauxkhall Astra glow light comes on and I’m having a loss of power

The first situation is that you identify that your glow plug light comes on while driving your Vauxkhall Astra and that you also encounter a loss of power. In this instance, some complications can explain its lightning. Here is a list of the most important causes:

  • Issue 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 expected that your preheat light comes on while driving on Vauxkhall Astra because it is one of the failures of which it is designed to notify you. Have the status of your valve checked out
  • Problem linked 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 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 destroyed by filings or other possible foreign bodies that affect its proper performance.
  • Finally, the last problem that could lead to a glow indicator light on your Vauxkhall Astra 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 Vauxkhall Astra

To conclude, we’ll give you the motives for a glow plug light that comes on on your Vauxkhall Astra without you feeling any difference in power or motor vehicle behaviour. In general, 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 get rid of the problem.
  • 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 recommend you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

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