When your check engine light is on

November 12th, 2021 by

Mercedes-Benz London’s

Service Tips & Tricks

The check engine light for some vehicles comes as a symbol of an engine, while some have it easily spelled out. Either way, that means there’s an issue inside your vehicle. We’ve explained the reasons why you may get this notification, and what our dedicated team will do to fix the problem.


What the Check Engine Light Means

The check engine light is part of your vehicle’s diagnostics system that activates when an issue is detected. Common reasons to see the check engine warning light include:

  • Loose Gas Cap – An easy fix, all you need to do is tighten the gas cap. If you tighten your gas cap and the engine warning light remains on, you’ll need to bring your vehicle in for service.
  • Spark Plugs – If you go too long between replacing your spark plugs, it can lead to your engine warning light being triggered. If you need your spark plugs replaced, you can find replacements at the Mercedes-Benz London parts centre.
  • Mass Airflow Sensor – Failing to replace your vehicle’s air filter is another reason your engine warning light may be on. During your regular Mercedes-Benz maintenance, our team can check your filter to ensure it doesn’t need replacing.
  • Oxygen Sensor – Faulty oxygen sensors are another reason your engine warning light will turn on. You’ll want to replace your oxygen sensor immediately as it can damage your catalytic converter.
  • Catalytic Converter – The catalytic converter can overheat as a result of a faulty oxygen sensor. This will require the care of the Mercedes-Benz London service centre.

What to Do When the Check Engine Light Appears

If the check engine light appears, it’s crucial to have the vehicle checked by a mechanic. However, the way in which the check engine light appears may indicate an emergency.

  • Blinking Light: This usually points to an engine misfire that can cause significant damage. In this case, you need to have your vehicle looked at as soon as possible.
  • A steady light usually means the problem isn’t an immediate emergency, but you still should schedule a service appointment as soon as you can.

Quick Tips for a Check Engine Light

Consider these tips that might quickly solve an issue associated with the check engine light:

  • Tighten your gas cap, as it may solve the problem.
  • Use remote diagnostic services, if you have access to them on newer models.
  • Reduce your speed and load if the check engine light is blinking.
  • Check for a serious, obvious problem yourself.

Have Your Engine Warning Light Checked at Mercedes-Benz London

Connect with Mercedes-Benz Burlington to schedule an appointment if your check engine light comes on, or if you’re in need of other Mercedes-Benz services. We’re here to help care for your vehicle and even prepare your emergency roadside kit so you’re never stranded in the Middlesex area around London.