A new warning light on your dashboard? You don’t figure out why it doesn’t shut off… It’s typical, an automobile is complex and there are multiple factors why a light may come on. In the event that your glow plug light comes on while driving your Volkswagen Beetle, it might indicate different problems. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will see how the preheating light on your Volkswagen Beetle operates, and then the different reasons it lights up when you are driving


What is the purpose of my Volkswagen Beetle glow plug light?

The main goal of the engine glow plug light, which is generally symbolized by a yellow coil, is to assure that your glow plugs are working correctly. In fact, it must light up when you switch on your Volkswagen Beetle 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 expected to stay or come on while driving with your automobile. Nevertheless, if it comes on while driving, it may indicate different failures, we will try to explain the most important ones.

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

A glow light that comes on while driving on your Volkswagen Beetle 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 look at this now. In any case, plug in your car to the diagnostic tool will allow you to carefully understand the explanation for the light up of your glow light.

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

The first situation is that you identify that your glow plug light comes on while driving your Volkswagen Beetle and that you also encounter a loss of power. In this case, different trouble can demonstrate its presence. Here is a list of the most important factors:

  • Trouble of EGR valve, indeed, if you go through a loss of power, it is possible that your EGR valve is clogged, in this case, it is logical that your preheat light comes on while driving on Volkswagen Beetle because it is one of the issue of which it is meant to alert you. Have the status of your valve looked at
  • Trouble associated with the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a disturbance in the performance of the turbo.
  • Trouble relevant to the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that disturb its proper performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Volkswagen Beetle 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 Volkswagen Beetle

Finally, we’ll give you the reasons for a glow plug light that comes on on your Volkswagen Beetle 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 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 out the other options first because it is not easy to find it alone, we suggest you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error
  • If you wish more tutorials on the Volkswagen Beetle, go to our Volkswagen Beetle category.