A new warning light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, a vehicle is complex and there are many motives why a light might come on. In cases where your glow plug light comes on while driving your Citroen Grand C4 Picasso, it may possibly reveal different things. On this page, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Citroen Grand C4 Picasso operates, and then the different motives it lights up when you are driving

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What is the role of my Citroen Grand C4 Picasso glow plug light?

The primary role of the engine glow plug light, which is most of the time represented by a yellow coil, is to assure that your glow plugs are working effectively. In reality, it must light up when you switch on your Citroen Grand C4 Picasso 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 car. Nevertheless, if it turns on while driving, it may suggest different issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Citroen Grand C4 Picasso?

A glow light that comes on while driving on your Citroen Grand C4 Picasso or at any other time other than when the engine is started is meant to notify you to a fault other than your spark plugs, we will look at this right now. In any case, 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 Citroen Grand C4 Picasso glow light comes on and I’m experiencing a loss of power

The first possibility is that you detect that your glow plug light comes on while driving your Citroen Grand C4 Picasso and that you also experience a loss of power. In such a case, different problems can demonstrate its lightning. Here is a list of the main motives:

  • Issue of EGR valve, in reality, if you are affected a loss of power, it is possible that your EGR valve is clogged, in such a case, it is rational that your preheat light comes on while driving on Citroen Grand C4 Picasso because it is one of the issue of which it is expected to warn you. Have the status of your valve tested
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a perturbation in the operation of the turbo.
  • Problem in connection with the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disrupt its proper performing.
  • Finally, the last issue that could lead to a glow indicator light on your Citroen Grand C4 Picasso 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 Grand C4 Picasso

To conclude, we’ll give you the motives for a glow plug light that comes on on your Citroen Grand C4 Picasso without you feeling any difference in power or car behaviour. Ordinarily, this is an electronic fault:

  • 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 solve 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 auto technician.
  • Faulty injection pressure sensor, ECU error
  • If you need more tutorials on the Citroen Grand C4 Picasso, go to our Citroen Grand C4 Picasso category.