A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s normal, an automobile is elaborate and there are many factors why a light may occur. If your glow plug light comes on while driving your Chevrolet Bolt, it might point out different issues. In this post, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your Chevrolet Bolt works, and then the different reasons it lights up when you are driving


What is the goal of my Chevrolet Bolt glow plug light?

The main goal of the engine glow plug light, which is in most cases represented by a yellow coil, is to ensure that your glow plugs are working correctly. In reality, it must light up when you switch on your Chevrolet Bolt 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 meant to stay or come on while driving with your vehicle. Nevertheless, if it turns on while driving, it may reveal different issues, we will try to point out the most important ones.

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

A glow light that comes on while driving on your Chevrolet Bolt or at any other time other than when the engine is started is intended to notify you to a fault other than your spark plugs, we will check out this now. In any case, a switch to the diagnostic tool will allow you to accurately translate the cause for the light up of your glow light.

My Chevrolet Bolt 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 Bolt and that you also encounter a loss of power. In such a case, different trouble can describe its lightning. Here is a list of the most important factors:

  • Trouble 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 obvious that your preheat light comes on while driving on Chevrolet Bolt because it is one of the issue of which it is intended to warn you. Have the status of your valve inspected
  • Problem 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 disturbance in the performance of the turbo.
  • Problem relevant 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 disturb its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Chevrolet Bolt 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 Bolt

Finally, we’ll give you the reasons for a glow plug light that comes on on your Chevrolet Bolt without you feeling any difference in power or vehicle behaviour. Ordinarily, this is an electronic fault:

  • Glow plug relays or fuses to be swapped out, 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 issue.
  • You have a false contact somewhere in your electrical circuit, test out the other solutions first because it is not easy to find it alone, we suggest you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error
  • If you want more guides on the Chevrolet Bolt, go to our Chevrolet Bolt category.