Why is my check engine light on? Here are six common reasons


While the illumination of the check engine light might not automatically mean that your vehicle is on the precipice of disaster, it's still best to quickly get to the shop for diagnostics so that you don't end up with a wildly expensive problem that could've been nipped in the bud. Here's a look at six common causes of a check engine light coming on.

Failing Mass Air Flow Sensor

Your air flow sensor is what keeps track of incoming air and then figures out how much fuel to inject with it. In the event that this is why your check engine light is turning on, you shouldn't have to spend too much loot to get the problem taken care of.

Faulty Catalytic Converter

This issue, on the other hand, can be quite spendy. Nonetheless, you'll need to promptly address this problem because of the important job of the catalytic converter, which is to turn carbon monoxide into an emission that is less polluting.

Failing Oxygen Sensor

This monitors the quantity of unburned oxygen is in your exhaust system. When there are issues with the oxygen sensor, an effect can be lower fuel-efficiency, as well as trouble with your catalytic converter.

Bad Battery or Charging System

A bad battery can cause low voltage at the computer, in turn triggering the check engine light.

Faulty Ignition Coil

The ignition coil plays a central role in generating the spark required for your engine to fire up on all cylinders. Sometimes, extreme weather temperatures will cause ignition coils to go awry.

Poorly-Fitting Gas Cap

While It might seem bizarre that this can trigger the light, it's true. If a gas cap isn't tightly sealed, fuel can evaporate before you get the chance to use it.

If you're in need of check engine light diagnostics and repair, be sure to visit a reputable mechanic. For engine repair in Dallas, Flower Mound, and Plano, TX, the experts to contact are at FixEuro at (972) 362-1741. FixEuro also specializes in European transmission repair in Dallas. Feel free to give FixEuro a call today to schedule an appointment for any of your vehicle's repair or maintenance needs!


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Written By Brian Corey

Published By MORBiZ