A new warning light on your dashboard? You don’t figure out why it doesn’t switch off… It’s normal, a vehicle is elaborate and there are multiple causes why a light could occur. In the event that your glow plug light comes on while driving your Peugeot 807, it may possibly indicate some issues. In this post, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Peugeot 807 works, and then the different reasons it lights up when you are driving

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What is the purpose of my Peugeot 807 glow plug light?

The primary role of the engine glow plug light, which is in most cases represented by a yellow coil, is to make sure that your glow plugs are working correctly. In fact, it must light up when you switch on your Peugeot 807 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 turns on while driving, it may indicate different issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Peugeot 807?

A glow light that comes on while driving on your Peugeot 807 or at any other time other than when the engine is started is meant to inform you to a fault other than your spark plugs, we will check out this right now. In any case, connecting your vehicle to the diagnostic tool will allow you to precisely translate the cause for the light up of your glow light.

My Peugeot 807 glow light comes on and I’m having a loss of power

The first probability is that you notice that your glow plug light comes on while driving your Peugeot 807 and that you also encounter a loss of power. In this instance, some problems can demonstrate its lightning. Here is a list of the main causes:

  • Trouble of EGR valve, in reality, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this instance, it is logical that your preheat light comes on while driving on Peugeot 807 because it is one of the issue of which it is supposed to warn you. Have the status of your valve examined
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can bring about turbo boost and a disturbance in the performance of the turbo.
  • Trouble related to 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 trouble that could lead to a glow indicator light on your Peugeot 807 coupled with a loss of power, is that your fuel filter is too dirty, you should feel 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 Peugeot 807

To conclude, we’ll give you the reasons for a glow plug light that comes on on your Peugeot 807 without you feeling any difference in power or motor vehicle behaviour. In most cases, this is an electronic fault:

  • 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 trouble.
  • You have a false contact somewhere in your electrical circuit, test out the other alternatives first because it is not easy to find it alone, we suggest you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you wish more guides on the Peugeot 807, go to our Peugeot 807 category.