A new light on your dashboard? You don’t understand why it doesn’t switch off… It’s typical, a car is elaborate and there are multiple reasons why a light might come on. In cases where your glow plug light comes on while driving your Volvo S90, it may show some 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 Volvo S90 operates, and then the different causes it lights up when you are driving

glow-plug-light-volvo-s90

What is the goal of my Volvo S90 glow plug light?

The main purpose of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to guarantee that your glow plugs are working effectively. Indeed, it must light up when you switch on your Volvo S90 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 meant to stay or come on while driving with your automobile. Nevertheless, if it comes on while driving, it may reveal several issues, we will try to summarize the most important ones.

What to do if the glow plug light comes on while driving on my Volvo S90?

A glow light that comes on while driving on your Volvo S90 or at any other time other than when the engine is started is designed to notify you to a fault other than your spark plugs, we will check out this now. No matter the reason, plug in your car to the diagnostic tool will allow you to carefully interpret the motive for the light up of your glow light.

My Volvo S90 glow light comes on and I’m going through a loss of power

The first probability is that you notice that your glow plug light comes on while driving your Volvo S90 and that you also experience a loss of power. In such a case, some problems can describe its lightning. Here is a list of the most important reasons:

  • Trouble of EGR valve, in fact, if you go through 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 Volvo S90 because it is one of the failures of which it is meant to warn you. Have the status of your valve examined
  • Problem linked 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 operation of the turbo.
  • Problem in connection with the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that disrupt its proper operation.
  • Finally, the last issue that could lead to a glow indicator light on your Volvo S90 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 Volvo S90

To conclude, we’ll give you the causes for a glow plug light that comes on on your Volvo S90 without you feeling any difference in power or automobile 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 fix the issue.
  • 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 suggest you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • If perhaps you have any further questions about the Volvo S90, do not hesitate to consult our Volvo S90 category.