A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s typical, an automobile is elaborate and there are various factors why a light may come on. In the event that your glow plug light comes on while driving your Citroen C4 Picasso, it might show some things. In the following paragraphs, we will do anything we can to support you see things more clearly. First, we will find out how the preheating light on your Citroen C4 Picasso operates, and then the different explanations it lights up when you are driving


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

The primary goal of the engine glow plug light, which is in most cases represented by a yellow coil, is to ensure that your glow plugs are working effectively. In fact, it must light up when you switch on your Citroen C4 Picasso 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 meant to stay or come on while driving with your vehicle. Nevertheless, if it comes on while driving, it may reveal different failures, we will try to point out the most important ones.

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

A glow light that comes on while driving on your Citroen C4 Picasso 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 take a look at this now. In any case, a switch to the diagnostic tool will allow you to carefully translate the reason for the light up of your glow light.

My Citroen C4 Picasso glow light comes on and I’m going through a loss of power

The first situation is that you detect that your glow plug light comes on while driving your Citroen C4 Picasso and that you also experience a loss of power. In this instance, some trouble can describe its presence. Here is a list of the most important factors:

  • Problem of EGR valve, in fact, if you are affected 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 Citroen C4 Picasso because it is one of the issue of which it is meant to warn you. Have the status of your valve looked at
  • Trouble 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 operation of the turbo.
  • Trouble in connection with the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that disturb its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Citroen C4 Picasso coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 C4 Picasso

To conclude, we’ll give you the explanations for a glow plug light that comes on on your Citroen C4 Picasso 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 replaced, 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 issue.
  • You have a false contact somewhere in your electrical circuit, test out the other options first because it is not easy to find it alone, we encourage you to go to your technician.
  • Faulty injection pressure sensor, ECU error
  • If perhaps you have any additional questions about the Citroen C4 Picasso, do not hesitate to consult our Citroen C4 Picasso category.