A new warning light on your dashboard? You don’t understand why it doesn’t shut off… It’s typical, an auto is elaborate and there are many factors why a light could occur. If it turns out your glow plug light comes on while driving your Citroen C5, it may suggest several problems. In this post, we will do everything we can to help you see things more clearly. First, we will discover how the preheating light on your Citroen C5 operates, and then the different causes it lights up when you are driving

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What is the role of my Citroen C5 glow plug light?

The primary role of the engine glow plug light, which is generally represented by a yellow coil, is to make sure that your glow plugs are working correctly. In reality, it must light up when you switch on your Citroen C5 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 car. But, if it comes 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 Citroen C5?

A glow light that comes on while driving on your Citroen C5 or at any other time other than when the engine is started is intended to warn you to a fault other than your spark plugs, we will take a look at this now. Whatever the case, plug in your car to the diagnostic tool will allow you to accurately understand the cause for the light up of your glow light.

My Citroen C5 glow light comes on and I’m going through a loss of power

The first situation is that you perceive that your glow plug light comes on while driving your Citroen C5 and that you also encounter a loss of power. In this instance, several trouble can describe its presence. Here is a list of the main factors:

  • Issue of EGR valve, indeed, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this instance, it is rational that your preheat light comes on while driving on Citroen C5 because it is one of the problem of which it is supposed to notify you. Have the status of your valve looked at
  • Issue linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can bring about turbo boost and a disturbance in the operation of the turbo.
  • Issue in connection 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 disturb its proper performing.
  • Finally, the last issue that could lead to a glow indicator light on your Citroen C5 coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 Citroen C5

Finally, we’ll give you the causes for a glow plug light that comes on on your Citroen C5 without you feeling any difference in power or car behaviour. Generally, this is an electronic fault:

  • Glow plug relays or fuses to be replaced, 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 resolve the issue.
  • 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

    • If perhaps you have any further questions about the Citroen C5, do not hesitate to consult our Citroen C5 category.