A new warning light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, a vehicle is complex and there are multiple causes why a light may occur. If your glow plug light comes on while driving your Chevrolet Tahoe, it may possibly signify several concerns. In the following paragraphs, we will do anything we can to help you see things more clearly. First, we will discover how the preheating light on your Chevrolet Tahoe operates, and then the different reasons it lights up when you are driving

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What is the purpose of my Chevrolet Tahoe glow plug light?

The main intent of the engine glow plug light, which is generally represented by a yellow coil, is to ensure that your glow plugs are working effectively. In reality, it must light up when you switch on your Chevrolet Tahoe 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 motor vehicle. But, if it comes on while driving, it may indicate several failures, we will try to detail the main ones.

What to do if the glow plug light comes on while driving on my Chevrolet Tahoe?

A glow light that comes on while driving on your Chevrolet Tahoe or at any other time other than when the engine is started is designed to notify 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 translate the explanation for the light up of your glow light.

My Chevrolet Tahoe glow light comes on and I’m experiencing a loss of power

The first probability is that you notice that your glow plug light comes on while driving your Chevrolet Tahoe and that you also encounter a loss of power. In this instance, several complications can demonstrate its presence. Here is a list of the main causes:

  • Trouble of EGR valve, in reality, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this case, it is obvious that your preheat light comes on while driving on Chevrolet Tahoe because it is one of the failures of which it is expected to notify you. Have the status of your valve inspected
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a disturbance in the performance of the turbo.
  • Trouble related to the injection, either an injector that has seized up or the injection pump that is broken by filings or other possible foreign bodies that affect its proper function.
  • Finally, the last issue that could lead to a glow indicator light on your Chevrolet Tahoe coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 Chevrolet Tahoe

Finally, we’ll give you the reasons for a glow plug light that comes on on your Chevrolet Tahoe without you feeling any difference in power or motor vehicle behaviour. In most cases, 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 fix the issue.
  • You have a false contact somewhere in your electrical circuit, test out the other alternatives 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 have any additional questions about the Chevrolet Tahoe, do not hesitate to consult our Chevrolet Tahoe category.