A new light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, an automobile is elaborate and there are various motives why a light might come on. If it turns out your glow plug light comes on while driving your Porsche Cayenne, it may indicate several concerns. On this page, we will do anything we can to support you see things more clearly. First, we will find out how the preheating light on your Porsche Cayenne works, and then the different explanations it lights up when you are driving

glow-plug-light-porsche-cayenne

What is the goal of my Porsche Cayenne glow plug light?

The main intent 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 effectively. In reality, it must light up when you switch on your Porsche Cayenne 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 meant to stay or come on while driving with your automobile. Nevertheless, if it turns on while driving, it may show different issues, we will try to point out the main ones.

What to do if the glow plug light comes on while driving on my Porsche Cayenne?

A glow light that comes on while driving on your Porsche Cayenne 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 check out this now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to carefully translate the cause for the light up of your glow light.

My Porsche Cayenne glow light comes on and I’m experiencing a loss of power

The first probability is that you recognize that your glow plug light comes on while driving your Porsche Cayenne and that you also experience a loss of power. In this case, several concerns can demonstrate its presence. Here is a list of the main motives:

  • Problem of EGR valve, indeed, if you go through a loss of power, it is possible that your EGR valve is blocked, in such a case, it is expected that your preheat light comes on while driving on Porsche Cayenne because it is one of the issue of which it is designed to notify you. Have the status of your valve inspected
  • Issue linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can lead to 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 destroyed by filings or other possible foreign bodies that affect its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Porsche Cayenne 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 Porsche Cayenne

Finally, we’ll give you the explanations for a glow plug light that comes on on your Porsche Cayenne without you feeling any difference in power or automobile 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 solve the trouble.
  • You have a false contact somewhere in your electrical circuit, test the other options first because it is not easy to find it alone, we encourage you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • To find more tips on the Porsche Cayenne, take a look at the Porsche Cayenne category.