A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, a vehicle is complicated and there are multiple motives why a light might occur. If it turns out your glow plug light comes on while driving your Tesla Model 3, it might point out several concerns. On this page, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Tesla Model 3 functions, and then the different motives it lights up when you are driving

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What is the purpose of my Tesla Model 3 glow plug light?

The main 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. Indeed, it must light up when you switch on your Tesla Model 3 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 supposed to stay or come on while driving with your automobile. Nevertheless, if it turns on while driving, it may indicate multiple issues, we will try to describe the main ones.

What to do if the glow plug light comes on while driving on my Tesla Model 3?

A glow light that comes on while driving on your Tesla Model 3 or at any other time other than when the engine is started is meant to warn you to a fault other than your spark plugs, we will look at this right now. No matter the reason, plug in your car to the diagnostic tool will allow you to properly translate the motive for the light up of your glow light.

My Tesla Model 3 glow light comes on and I’m having a loss of power

The first probability is that you identify that your glow plug light comes on while driving your Tesla Model 3 and that you also experience a loss of power. In such a case, several concerns can demonstrate its presence. Here is a list of the main motives:

  • Issue of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this case, it is rational that your preheat light comes on while driving on Tesla Model 3 because it is one of the failures of which it is designed to notify you. Have the status of your valve checked
  • Trouble related to 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.
  • Trouble associated with the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disturb its proper functioning.
  • Finally, the last problem that could lead to a glow indicator light on your Tesla Model 3 coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 3

To conclude, we’ll give you the motives for a glow plug light that comes on on your Tesla Model 3 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 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 solve the problem.
  • You have a false contact somewhere in your electrical circuit, check the other solutions first because it is not easy to find it alone, we advise you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you wish more tutorials on the Tesla Model 3, go to our Tesla Model 3 category.