A new warning light on your dashboard? You don’t find out why it doesn’t turn off… It’s typical, an auto is elaborate and there are many causes why a light could come on. In the event that your glow plug light comes on while driving your Mercedes Classe G 3, it may possibly point out some problems. In this post, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Mercedes Classe G 3 works, and then the different explanations it lights up when you are driving

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What is the goal of my Mercedes Classe G 3 glow plug light?

The primary purpose of the engine glow plug light, which is generally symbolized by a yellow coil, is to make sure that your glow plugs are working properly. In fact, it must light up when you switch on your Mercedes Classe G 3 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. However, if it comes on while driving, it may suggest different issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Mercedes Classe G 3?

A glow light that comes on while driving on your Mercedes Classe G 3 or at any other time other than when the engine is started is intended to inform you to a problem other than your spark plugs, we will take a look at this right now. No matter the reason, a switch to the diagnostic tool will allow you to carefully interpret the motive for the light up of your glow light.

My Mercedes Classe G 3 glow light comes on and I’m encountering a loss of power

The first probability is that you identify that your glow plug light comes on while driving your Mercedes Classe G 3 and that you also experience a loss of power. In this case, some trouble can explain its presence. Here is a list of the main causes:

  • Issue of EGR valve, in reality, if you undergo a loss of power, it is possible that your EGR valve is blocked, in such a case, it is rational that your preheat light comes on while driving on Mercedes Classe G 3 because it is one of the problem of which it is supposed to warn you. Have the status of your valve examined
  • Trouble 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.
  • Trouble associated with 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 function.
  • Finally, the last problem that could lead to a glow indicator light on your Mercedes Classe G 3 coupled with a loss of power, is that your fuel filter is too dirty, you should come to 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 Mercedes Classe G 3

Finally, we’ll give you the explanations for a glow plug light that comes on on your Mercedes Classe G 3 without you feeling any difference in power or automobile behaviour. Generally, this is an electronic problem:

  • Glow plug relays or fuses to be replaced, 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 resolve the problem.
  • You have a false contact somewhere in your electrical circuit, check the other alternatives first because it is not easy to find it alone, we encourage you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • To discover more tips on the Mercedes Classe G 3, take a look at the Mercedes Classe G 3 category.