A new warning light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, an automobile is complex and there are many motives why a light may occur. In cases where your glow plug light comes on while driving your Tesla Model S, it may show different issues. In this article, we will do everything we can to support you see things more clearly. First, we will see how the preheating light on your Tesla Model S operates, and then the different reasons it lights up when you are driving

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What is the purpose of my Tesla Model S glow plug light?

The main purpose of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to guarantee that your glow plugs are working correctly. In reality, it must light up when you switch on your Tesla Model S 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 car. But, if it comes on while driving, it may indicate multiple failures, we will try to point out the main ones.

What to do if the glow plug light comes on while driving on my Tesla Model S?

A glow light that comes on while driving on your Tesla Model S or at any other time other than when the engine is started is intended to alert you to a problem other than your spark plugs, we will look at this now. Whatever the case, plug in your car to the diagnostic tool will allow you to properly translate the explanation for the light up of your glow light.

My Tesla Model S glow light comes on and I’m experiencing a loss of power

The first possibility is that you detect that your glow plug light comes on while driving your Tesla Model S and that you also encounter a loss of power. In this instance, different concerns can demonstrate its lightning. Here is a list of the main motives:

  • Problem of EGR valve, in reality, 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 Tesla Model S because it is one of the problem of which it is intended to alert you. Have the status of your valve examined
  • Problem linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can bring about turbo boost and a perturbation in the operation of the turbo.
  • Problem linked to 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 functioning.
  • Finally, the last trouble that could lead to a glow indicator light on your Tesla Model S 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 Tesla Model S

To finish , we’ll give you the reasons for a glow plug light that comes on on your Tesla Model S without you feeling any difference in power or car behaviour. Ordinarily, 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 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 recommend you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • If you wish more guides on the Tesla Model S, go to our Tesla Model S category.