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What does it mean and how to react?

The dreaded check engine light is one of the most worrying lights for any driver. Learn about the possible causes behind this indicator and what to do if it comes on while you are driving.

Every driver's nightmare

Imagine the scene: you get into your car, you turn the key and suddenly, in the middle of the dashboard, the check engine light comes on. At that moment, a shiver runs down your spine and worry fills you. But what does this light really mean and how should you react?

First of all, it is important to note that the check engine light can come on for multiple reasons, some more serious than others. However, regardless of the cause, if this light comes on while you are driving, the best thing to do is to pull over in a safe place and consult the vehicle's manual. On some models, the color of the light can even indicate the type of problem.

Common causes of the check engine light

If the check engine light comes on but the car continues to operate normally, it is likely that the problem is not extremely serious. However, if in addition to the indicator light, unusual symptoms appear such as strange noises, smoke or a loss of power, the situation could become complicated.

Here are the main causes and symptoms associated with the check engine light coming on:

  • Power Loss: If the warning light is accompanied by a noticeable power loss, the security system may have activated emergency mode. Stop as soon as possible and call your mechanic.
  • Temperature problem: If the check engine light comes on at the same time as the temperature light, there may be a problem with the car's cooling system. Stop immediately and contact your mechanic.
  • Darker smoke: If the check engine light is accompanied by abundant dark smoke, there could be a problem with the turbo, an anomaly in the combustion of the fuel, with the glow plugs or with the EGR valve.
  • Higher consumption than usual: In this case, the engine warning light could have come on due to an injection problem. This problem may also cause more smoke than usual or a loss of power.
  • Electrical failure: If the spark plugs are not working properly, the check engine light may also come on. Additionally, if the spark plugs or air flow sensors have problems, the catalyst could be damaged (which would increase emissions and consumption), and this repair is very expensive.
  • What to do when the check engine light comes on?

    If you are driving and the check engine light comes on, here are the steps to follow:

  • Park in a safe place as soon as possible.
  • Check your vehicle manual for specific information about the light and its meaning.
  • Observe how your car behaves. Are there any unusual symptoms like noises, smoke or loss of power?
  • If you are unsure of the severity of the problem, contact your mechanic for advice.
  • Do not continue driving if the problem appears serious, as this could cause further damage to your vehicle.
  • In summary, the check engine light is a crucial indicator that should not be ignored. By being alert to the accompanying symptoms and taking the appropriate steps, you can avoid causing further damage to your vehicle and keep yourself safe on the road.

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