A new light on your dashboard? You don’t understand why it doesn’t switch off… It’s typical, a vehicle is complex and there are many motives why a light could come on. In cases where your glow plug light comes on while driving your Lexus RX, it may possibly show some 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 Lexus RX works, and then the different motives it lights up when you are driving

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What is the role of my Lexus RX glow plug light?

The main purpose of the engine glow plug light, which is generally represented by a yellow coil, is to make sure that your glow plugs are working correctly. In reality, it must light up when you switch on your Lexus RX 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 car. But, if it comes on while driving, it may show several issues, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Lexus RX?

A glow light that comes on while driving on your Lexus RX or at any other time other than when the engine is started is intended to warn you to a fault other than your spark plugs, we will take a look at this right now. Whatever the case, plug in your car to the diagnostic tool will allow you to carefully translate the explanation for the light up of your glow light.

My Lexus RX glow light comes on and I’m suffering from a loss of power

The first possibility is that you notice that your glow plug light comes on while driving your Lexus RX and that you also experience a loss of power. In this instance, some problems can describe its presence. Here is a list of the most important motives:

  • Problem of EGR valve, indeed, if you suffer a loss of power, it is possible that your EGR valve is blocked, in this instance, it is rational that your preheat light comes on while driving on Lexus RX because it is one of the issue of which it is meant to notify you. Have the status of your valve checked
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can result in turbo boost and a perturbation in the operation of the turbo.
  • Trouble related 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 disturb its proper performance.
  • Finally, the last trouble that could lead to a glow indicator light on your Lexus RX 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 Lexus RX

To finish , we’ll give you the motives for a glow plug light that comes on on your Lexus RX without you feeling any difference in power or car behaviour. Generally, 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 resolve 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 advise you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

    • In the event that you have any additional questions about the Lexus RX, do not hesitate to consult our Lexus RX category.