7 Possible Reasons Your Check Engine Light Is On

7 Possible Reasons Your Check Engine Light Is On


7 Possible Reasons Your Check Engine Light Is OnWhile an illuminated check engine light doesn't automatically mean that disaster is imminent, it's still best to get to the shop for computerized diagnostics so that any developing issues can be addressed before they necessitate more costly repairs. Here's a look at seven common check engine light triggers.

Failing Mass Airflow Sensor

Mass airflow sensors keep tabs on the quantity of incoming air and calculate how much fuel to inject with it. One symptom of mass airflow trouble is rough idling.

Faulty Catalytic Convertor

Your catalytic converter has the important job of turning carbon monoxide into an emission that isn't as polluting. Dark exhaust smoke and worsening acceleration are two signs of a catalytic converter problem.

Bad Oxygen Sensor

Oxygen sensors monitor the amount of unburned oxygen in the exhaust system. Issues with an oxygen sensor can lead to catalytic converter trouble.

Failing Spark Plugs

In older vehicles, spark plugs generally need to be replaced about every 30,000 miles. But in vehicles that were built after 2000, you can often wait 100,000 miles before plugs need to be changed out. Healthy spark plugs play an important role in optimizing performance and fuel-efficiency.

Bad Battery/Charging System

A bad battery can lead to low voltage at the computer, which can consequently cause the check engine light to illuminate.

Loose/Missing Gas Cap

Though it might seem bizarre, a loose or missing gas cap can actually trigger the check engine light, while also allowing gas to evaporate before you get the chance to use it.

Faulty Ignition Coil

For your vehicle to come roaring to life on all cylinders, you need ignition coils to help supply the spark. Sometimes, ignition coils will fail due to extreme weather.

If you need check engine light diagnostics and repair, be sure to visit a reputable mechanic. For auto repair in Leawood, Lenexa, and Olathe, KS, contact the experts at Smith Specialty Automotive at (913) 270-1893. Feel free to give Smith Specialty Automotive a call today to schedule an appointment for any of your vehicle's repair or maintenance needs!


Smith Specialty Automotive Blog
Posted: September 13, 2020

Written and Published By MORBiZ