7 Possible Reasons that Your Check Engine Light Turned On


An illuminated check engine light isn't necessarily a sign that your engine is on the brink of failure. Nonetheless, it's best to be proactive and get to the shop for computerized diagnostics so that any developing problems can be brought to the mechanic's attention before they get worse. Here are seven common reasons the check engine light comes on.

Failing Catalytic Converter

The catalytic converter significantly reduces the amount of harmful pollutants that your vehicle produces as it drives. Signs of catalytic converter trouble include worsening acceleration, a sulphurous odor, and darkened exhaust smoke.

Faulty Oxygen Sensor

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

Failing Spark Plugs

If your spark plugs are dirty and overdue for replacement, then they may regularly misfire, which can cause a reduction in performance and gas mileage. Generally, vehicles made after 2000 can go 100,000 miles before plug replacement, while older vehicles need new plugs more often.

Issues with Battery/Charging System

A bad battery may trigger your check engine light by causing low voltage at the computer.

Faulty Mass Air Flow Sensor

MAF sensors keep tabs on how much air is coming in and determine how much fuel needs to be injected with it. A failing MAF sensor could cause your engine to struggle to start, or to stall shortly after starting.

Loose/Missing Gas Cap

A properly sealed gas cap will prevent fuel from evaporating before you get the chance to use it. Though it might seem bizarre, a gas cap issue may potentially trigger the check engine light.

Bad Ignition Coil

Healthy ignition coils help to generate the spark your engine needs to come roaring to life. Power loss and misfiring are symptoms of ignition coil trouble.

If you need auto repair, be sure to entrust the work to a reputable mechanic. For auto repair in Orlando, Bithlo, Waterford Lakes, Union Park, and Conway, FL, contact the experts at Express Oil Change & Service Center at (407) 502-4984. Express Oil Change & Service Center offers 10-minute oil changes in Orlando. Feel free to give Express Oil Change & Service Center a call today to make an appointment for your vehicle's repair or maintenance needs!

Express Oil Change & Tire Engineers Blog
Posted: March 23, 2021

Written By John Grassia

Written and Published By MORBiZ

Common Symptoms of Cooling System Trouble
Does my car need suspension repair?
We Honor Our Veterans
What maintenance tasks should be done before a road trip?
Simple Ways to Keep Your Automatic Transmission Healthy
7 Possible Reasons that Your Check Engine Light Turned On
The Truth About $20 Oil Changes
Why You Should Always Stay Up to Date with Oil Changes
7 Types of Car Trouble that Cause No-Start
It's Cheaper to Keep 'Er
5 Expert Tire & Wheel Services in Orlando
7 Symptoms of a Bad Alternator
Phase Out of Conventional Oil
Expert Auto Repair in Orlando
When to Get Your Transmission Fluid Flushed
Covid-19 Safety at Express Oil
Auto Maintenance to Improve Performance & Safety
6 Signs of a Failing Suspension
7 Easy Tips for Boosting Gas Mileage
When is the Last Time You had Your Brakes Serviced?
5 Signs it is time for Radiator Repair
Spring Tire Maintenance
What does an oil change do?
This Means it is Time to Schedule Auto Repair
When to Schedule Engine Repair
Common Symptoms of Alternator Failure
Identifying Automotive Fluid Leaks
Is it Time for Fuel System Repair?
5 Times You Should Visit the Auto Shop Immediately
5 Common Check Engine Light Triggers
4 Common Signs of Starter Motor Trouble
Common Signs of an Exhaust Leak
Coolant Flushes
Not All Oils Are Equal
5 Signs it is Time for Transmission Service
Is it Time for Brake Repair?
How To Buy A Used Car
Common Signs of Trouble Under the Hood
How Much Should I Pay For Shop Supplies?
Customer Reviews of Express Oil Change in Orlando
What Does Colorful Exhaust Smoke Mean?
What's Leaking From My Car?
What is the Timing Belt and Do I need to Replace it?
What Type of Oil Should I Use?
Common Signs it is Time for Auto Repair
Are Oil Changes Really Necessary?
How Routine Auto Maintenance Saves You Money
Easy Ways to Improve Fuel Efficiency this Summer
5 Signs of Transmission Trouble
Is it Time for Transmission Maintenance
What you need to know when buying new tires
5 Signs your Car Needs Ignition Repair
Top Signs of Engine Trouble
Complete Auto Repair in Florida
Power Steering Service
Electrical Diagnostics Solve Auto Problems
Auto AC Service/Repairs in Orlando
Looking for Power Steering Service?
Brake Repair in Orlando
Is it Time for An Engine Rebuild?
10 Minute Oil Change in Orlando
Top Quality Transmission Service in Orlando
Expert Help with Alignments
The Best Complete Auto Repair in Orlando
Certified Master Mechanic for Mercedes Benz
The Next Time You Need Ignition System Repair
Synthetic Oil Changes
Getting Expert Electrical Diagnostics
Auto A/C Service and Repairs
The Importance of Brake Repair
The Truth About $18 Oil Changes
Power Steering Service
The Convenience of a 10 Minute Oil Change
Things to Consider When Thinking of Engine Rebuilds
Tire Sales & Service - Things to Consider
Are You in Need of Transmission Service?
What to Know About Michelin Tires
How to know if You need a Wheel Alignment
Why is the Check Engine Light On?
Easy Auto Maintenance to Increase MPGs
5 Symptoms of Brake Trouble
4 Common Signs of Suspension Trouble
Bad Vibes: What is Making My Car Shake?
Why Won't My Car Start?
Nice Car, Sick Engine
Is it Time for Timing Belt Repair?
Unfortunate Signs it is Time for Engine Repair
5 Signs the Alternator is Failing
Common Signs of Cooling System Failure
Why Do I Need to Change the Oil?
Identifying and Stopping Vehicle Leaks
Why are Oil Changes so Important?
4 Tips for Road Trip Preparation this Summer