7 Reasons the Check Engine Light Turns On

7 Reasons the Check Engine Light Turns On


7 Reasons the Check Engine Light Turns OnAlthough the illumination of the check engine light doesn't automatically mean that disaster is near, it's still best to promptly get to the shop for diagnostics. This will help to ensure that you don't end up needing major repairs that could've been prevented. Here's a look at seven common check engine light triggers.

Failing Mass Airflow Sensor

The mass airflow sensor's important job is to keep tabs on the quantity of incoming air and determine how much fuel should be injected with it. A bad mass airflow sensor can lead to poor gas mileage and stalling.

Bad Catalytic Convertor

The catalytic converter is tasked with turning carbon monoxide into a less harmful emission. While this can be rather expensive to replace, it's important to do so.

Faulty Oxygen Sensor

Oxygen sensors monitor the amount of unburned oxygen in the exhaust system. Oxygen sensor problems can lead to catalytic converter issues.

Loose/Missing Gas Cap

While this might seem like a trivial matter, a loose or missing gas cap can cause fuel to evaporate---and can actually trigger the check engine light.

Faulty Ignition Coil

Ignition coils play a critical role in creating the spark needed for engines to come roaring to life on all cylinders. In some cases, extreme weather conditions cause ignition coils to fail.

Bad Battery/Charging System

When a battery is failing, it can cause low voltage at the computer, which can consequently result in the illumination of the check engine light.

Faulty Spark Plugs

In older model vehicles, the plugs should typically be replaced about every 30,000 miles. For vehicles that were manufactured after 2000, you can usually wait 100,000 miles before plug replacement. For optimal performance and fuel-efficiency, it's important to drive with healthy spark plugs.

If you need check engine light diagnostics, be sure to visit a reputable mechanic. For check engine light diagnostics and repair in Austin, TX, contact the experts at Jimmy's Top Tech Auto at (512) 768-2965. Feel free to give Jimmy's Top Tech Auto a call today to schedule an appointment for any of your repair or maintenance needs!


Jimmy's Top Tech Auto Blog
Posted: June 09, 2020

Written and Published By MORBiZ