A new light on your dashboard? You don’t find out why it doesn’t switch off… It’s normal, a car is complex and there are various motives why a light may come on. If it turns out your glow plug light comes on while driving your Buick Lucerne, it might suggest different concerns. 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 Buick Lucerne works, and then the different motives it lights up when you are driving


What is the goal of my Buick Lucerne glow plug light?

The primary role of the engine glow plug light, which is generally symbolized 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 Buick Lucerne to tell you that they are heating the intake air in your cylinders and must go out after a few minutes 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 suggest several issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Buick Lucerne?

A glow light that comes on while driving on your Buick Lucerne or at any other time other than when the engine is started is meant to inform you to a problem other than your spark plugs, we will take a look at this now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to accurately translate the motive for the light up of your glow light.

My Buick Lucerne glow light comes on and I’m encountering a loss of power

The first probability is that you recognize that your glow plug light comes on while driving your Buick Lucerne and that you also encounter a loss of power. In this case, different complications can describe its lightning. Here is a list of the main motives:

  • Issue of EGR valve, in fact, 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 Buick Lucerne because it is one of the failures of which it is supposed to alert you. Have the status of your valve inspected
  • Problem related 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 operation of the turbo.
  • Problem linked to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disturb its proper performance.
  • Finally, the last issue that could lead to a glow indicator light on your Buick Lucerne 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 Buick Lucerne

Finally, we’ll give you the motives for a glow plug light that comes on on your Buick Lucerne without you feeling any difference in power or car behaviour. In general, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 solve 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 recommend you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error
  • If you have any additional questions about the Buick Lucerne, do not hesitate to consult our Buick Lucerne category.