A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, an automobile is complex and there are various causes why a light could come on. If your glow plug light comes on while driving your Volkswagen Caddy, it might indicate several issues. In this post, we will do anything we can to support you see things more clearly. First, we will see how the preheating light on your Volkswagen Caddy functions, and then the different explanations it lights up when you are driving

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

The main role of the engine glow plug light, which is generally symbolized by a yellow coil, is to ensure that your glow plugs are working correctly. Indeed, it must light up when you switch on your Volkswagen Caddy 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 vehicle. But, if it comes on while driving, it may reveal several troubles, we will try to point out the most important ones.

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

A glow light that comes on while driving on your Volkswagen Caddy or at any other time other than when the engine is started is meant to inform you to a problem other than your spark plugs, we will take a look at this right now. Whatever the case, a switch to the diagnostic tool will allow you to properly interpret the reason for the light up of your glow light.

My Volkswagen Caddy 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 Caddy and that you also encounter a loss of power. In this case, several problems can demonstrate its presence. Here is a list of the most important causes:

  • 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 case, it is expected that your preheat light comes on while driving on Volkswagen Caddy because it is one of the failures of which it is supposed to notify you. Have the status of your valve inspected
  • Issue associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a disturbance in the performance of the turbo.
  • Issue linked to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disturb its proper performing.
  • Finally, the last issue that could lead to a glow indicator light on your Volkswagen Caddy 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 Caddy

Finally, we’ll give you the explanations for a glow plug light that comes on on your Volkswagen Caddy 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 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 resolve the issue.
  • 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
  • If you want more tutorials on the Volkswagen Caddy, go to our Volkswagen Caddy category.