7 Reasons the Check Engine Light Comes On

7 Reasons the Check Engine Light Comes OnIf your check engine light turns on, you might worry that disaster is looming. However, something as minor as a loose gas cap could potentially trigger the check engine light. Still, when the light illuminates, it's best to get to the shop for diagnostics so that you don't risk the problem worsening to the point that you need major repairs that could've been nipped in the bud. Here's a look at seven common check engine light triggers.

Faulty Mass Airflow Sensor

Mass airflow sensors keep tabs on the quantity of incoming air and calculate how much fuel should be injected with it.

Failing Catalytic Convertor

The catalytic converter's important job is to turn carbon monoxide into an emission that isn't as polluting. This can be a rather costly issue, but is nonetheless an important one to address.

Bad Oxygen Sensor

Oxygen sensors monitor the amount of unburned oxygen that's present in the exhaust system. Oxygen sensor trouble can potentially lead to issues with the catalytic converter.

Faulty Spark Plugs

The spark plugs in older vehicles should generally be replaced every 30,000 miles. But vehicles that were built after 2000 can typically go 100,000 miles before plug replacement is needed. Healthy spark plugs help to optimize performance and fuel-efficiency.

Failing Battery/Charging System

When a battery is failing, it can cause low voltage at the computer, which can then trigger the check engine light.

Faulty Ignition Coil

Ignition coils serve a central role in creating the spark needed for engines to fire up on all cylinders. In some cases, ignition coils fail due to extreme weather.

Loose/Missing Gas Cap

A poorly-fitting gas cap can lead to fuel evaporating before you get the chance to use it. While it might seem strange, a loose or missing gas cap can actually trigger the check engine light.

If you need check engine light diagnostics or repair, be sure to visit a reputable auto shop. For auto repair in Denver, Thornton, Arvada, and Westminster, CO, contact the experts at All Engines & Transmissions at (720) 707-0183. Feel free to give All Engines & Transmissions a call today to schedule an appointment for any of your vehicle's repair or maintenance needs!

All Engines & Transmissions Blog
Posted: June 28, 2020

Written and Published By MORBiZ

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