Common Reasons the Check Engine Light Turns On


If your check engine light flashes on, it doesn't automatically mean that your engine is about to go kaput. Nonetheless, it's still best to get to the shop for diagnostics so that any developing problems can be addressed before they get worse and require repairs that are more expensive than should've been necessary. At A-1 Automotive, our local mechanics are experts at diagnosing and fixing problems that trigger the check engine light. Come and see us for computerized diagnostics when your check engine light illuminates.

What is triggering my check engine light?

Faulty catalytic converters are often to blame when the check engine light comes on. Symptoms of catalytic converter trouble include worsening gas mileage, poor acceleration, and a smell like rotten eggs. To ensure that your vehicle isn't creating excessive pollution, you need a catalytic converter that is functioning properly. When an O2 sensor is malfunctioning, it can trigger the check engine light, and may also lead to problems with the catalytic converter. Problems with a mass airflow sensor can also cause the light to flash on. A bad mass airflow sensor can cause your engine to hesitate during acceleration, and may lead to stalling.

If a faulty battery is causing low voltage at the computer, then it could trigger the check engine light. When you put a new battery in your car, it should work dependably for three to five years. Once the battery enters this timeframe, it's more likely to become problematic.
Failing spark plugs are another problem that can cause the light to illuminate. Cars made in the past twenty years can often go 100,000 miles before needing new plugs. Older automobiles tend to need their plugs replaced more regularly. Malfunctioning ignition coils can also trigger the light. Signs of an ignition coil issue include rough idling, misfiring, and power loss during acceleration.
If you're lucky, all that's causing your check engine light to come on is a loose gas cap. Whenever you fill up, it's important that your gas cap is returned to a tightly secured position. If your cap is loose or missing, fuel could evaporate and your check engine light could get triggered.

Check Engine Light Repair in Vancouver, WA

When you need auto repair in Portland, OR or Vancouver, WA, visit A-1 Automotive. At our local auto shop, our reputable mechanics can expertly complete any type of repair or maintenance that your vehicle needs. Feel free to give us a call today to make an appointment!

Kory's Blog
Posted: August 22, 2021

Written and Published By MORBiZ

Important Winter Auto Maintenance Tasks to Keep You Safe
Helpful Tips for Preventing Fuel Waste while Driving
Signs of Serious Engine Trouble that We Can Fix at Our Portland Auto Shop
Simple Ways to Keep Your Brakes Healthy
Common Reasons the Check Engine Light Turns On
Does my car need brake repair? Here Are Common Signs that Say Yes
What types of maintenance should be completed before a road trip?
Suspension Failure: 6 Warning Signs
Common Warning Signs of Alternator Trouble
Why You Should Always Keep Up with Your Oil Change Schedule
Cooling System Trouble: 6 Warning Signs
7 Common Problems that Prevent Engines from Starting
8 Types of Winter Auto Maintenance for Safe Driving
7 Simple Tips for Better Fuel-Efficiency
Why to Get a Coolant Flush
Expert Auto Repair in Vancouver, WA
7 Issues that Can Trigger Your Check Engine Light
Would my car benefit from a transmission flush?
7 Signs of Brake Trouble
Enhance Safety & Performance with these 6 Maintenance Tasks
6 Warning Signs of Transmission Trouble
6 Indications of a Suspension Problem
What are the signs of an alternator issue?
6 Qualifications for a Shop to Gain AAA-Certification
6 Car Problems that Can Cause No-Start
7 Important Winter Auto Maintenance Tasks to Keep You Safe
Tips for Figuring Out Which Kind of Fluid Is Leaking from Your Vehicle
8 Tips for Boosting MPGs
Make Sure Your Vehicle Stays Current on These 6 Fluid Flushes
Common Reasons a Check Engine Light Turns On
5 Important Summertime Maintenance Tasks
How to Know if There's an Issue with Your Cooling System
Brake Trouble: 6 Symptoms
Is my transmission failing?
BG Fuel and Induction Service: Boost Performance and Extend the Life of Your Engine
Warning Signs of Suspension Trouble
BG Automotive Maintenance Services and Products
How to Know if Your Alternator Is Failing
Don't skip these 6 important winter maintenance tasks!
5 Issues that Could Prevent Your Car from Starting
Expert Transmission Service in Portland, OR
5 Requirements for an Auto Shop to Be AAA-Certified
6 Simple Ways to Increase Your Gas Mileage
Keep Your Vehicle Up to Date on these 5 Types of Fluid Flushes
Planning a road trip? Here are six maintenance tasks before heading out!
How to know if you need engine repair
Expert Auto Repair in Southeast Portland, OR
What Is Triggering My Check Engine Light?
6 Signs of a Transmission Issue
How to know if you need brake repair
Make an appointment for these six winter maintenance tasks in Portland, OR!
Top Signs of Alternator Failure
5 Signs of a Cooling System Problem
Do I need new shocks or struts?
5 Tips on How to Improve Your MPGs
6 Maintenance Services Provided by a Reputable Mechanic in Portland, OR
5 Helpful Maintenance Tips to Prepare Your Car for Winter
4 Types of Repair Offered by the Best Mechanic in Portland
6 Services Provided by a Reputable Portland Mechanic
Which kind of fluid is leaking from my vehicle?
5 Signs That it's Time to Get a Tune-Up
5 Red Flags that Could Mean You Need a New Fuel Filter
3 Signs of a Transmission Problem
4 Important Reasons to Conduct Oil Changes on TIme
How to Winterize your Car
What does the Suspension Do & Why Should I Repair It?
4 Signs of Brake Failure You Need to Know
How to Improve Gas Mileage this Summer
3 Signs you may need an Engine Rebuild
5 Common Causes the Check Engine Light Comes On