A new light on your dashboard? You don’t understand why it doesn’t shut off… It’s typical, an auto is complicated and there are many reasons why a light could occur. If it turns out your glow plug light comes on while driving your Volkswagen Tiguan, it may show different things. In this post, we will do anything we can to help you see things more clearly. First, we will find out how the preheating light on your Volkswagen Tiguan operates, and then the different causes it lights up when you are driving

glow-plug-light-volkswagen-tiguan

What is the role of my Volkswagen Tiguan glow plug light?

The main purpose of the engine glow plug light, which is in most cases represented by a yellow coil, is to guarantee that your glow plugs are working properly. In reality, it must light up when you switch on your Volkswagen Tiguan 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 automobile. But, if it comes on while driving, it may suggest multiple issues, we will try to detail the most important ones.

What to do if the glow plug light comes on while driving on my Volkswagen Tiguan?

A glow light that comes on while driving on your Volkswagen Tiguan or at any other time other than when the engine is started is intended to notify you to a problem other than your spark plugs, we will check out this now. In any case, a switch to the diagnostic tool will allow you to precisely understand the motive for the light up of your glow light.

My Volkswagen Tiguan glow light comes on and I’m going through a loss of power

The first situation is that you recognize that your glow plug light comes on while driving your Volkswagen Tiguan and that you also knowledge a loss of power. In this instance, different trouble can demonstrate its lightning. Here is a list of the most important reasons:

  • Problem of EGR valve, in fact, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this instance, it is expected that your preheat light comes on while driving on Volkswagen Tiguan because it is one of the problem of which it is designed to alert you. Have the status of your valve checked
  • 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 perturbation in the operation of the turbo.
  • Issue associated 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 disrupt its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Volkswagen Tiguan 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 Volkswagen Tiguan

To conclude, we’ll give you the causes for a glow plug light that comes on on your Volkswagen Tiguan without you feeling any difference in power or automobile behaviour. In general, this is an electronic problem:

  • 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 fix the trouble.
  • You have a false contact somewhere in your electrical circuit, test 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

    • Whenever you have any further questions about the Volkswagen Tiguan, do not hesitate to consult our Volkswagen Tiguan category.