Why is the Check Engine Light On?
It seems to be the easiest thing in the world to ignore: the check engine light. Unfortunately paying no attention to that little orange glow could land you in some hot water at the auto shop. Chances are that when that light first comes on there is a small problem that could be fixed quickly and inexpensively. Unfortunately, the longer you wait to find out just what is actually wrong, the more the problem will become exacerbated. Here's a look at some of the most common issues related to the illumination of the check engine light.
Loose Gas Cap
You may be surprised to learn that not tightening your gas cap after filling up could cause the light to turn on. This is because a loose cap will allow for gas to evaporate out of the filler hose, thus wasting fuel your car never even had a chance to use. Always be sure to tighten up after filling up.
Failed O2 Sensor
The oxygen sensor is in the exhaust system and monitors oxygen levels in the emissions to help dictate the correct air and fuel mixture. Many times the sensor just needs to be cleaned and reset.
Malfunctioning MAF Sensor
Another sensor that helps to ensure the correct air and fuel mixture is the mass airflow sensor. It measures incoming air and calculates how much needs to be mixed with gasoline. A malfunctioning MAF sensor can greatly reduce your fuel efficiency.
Misfiring Spark Plugs
Misfiring spark plugs can also reduce your miles per gallon. Even if they are off by a split second it will prevent fuel from being properly burnt and can cause numerous other problems for your vehicle's engine.
Failed Catalytic Converter
One of the worst problems related to the check engine light is finding out that you need a new catalytic converter. This piece of the exhaust system converts hazardous exhaust fumes into less harmful emissions, but it won't fail unless some other problem occurs first, such as a failed oxygen sensor. This is why it is extremely important to have diagnostics ran as soon as the light comes on.
If you need check engine light diagnostics in Lancaster or the surrounding area be sure to head into McKonly's Garage. We utilize state of the art diagnostic and repair technology at our auto maintenance shop. Give us a call today at (717) 208-8210 to make an appointment for expert auto repair in Lancaster.
McKonly's Garage Blog
Written By Brian Corey
Published By MORBiZ
4 Common Signs of Starter Motor Failure
Easy Ways to Improve MPGs
Does my Car Have an Exhaust Leak?
How to Tell if it is Time for Brake Repair
5 Common Check Engine Light Problems
Common Auto Electric Problems You Should Know
4 Causes of a Failed Emissions Test
How to Know if You Need Cooling System Repair
Should I go to the Auto Repair Shop if...
5 Signs Your Vehicle Needs a Wheel Alignment
Must do: End of Summer Auto Maintenance
My Car Won't Start, What Could it Be?
Is it Time for Transmission Repair or Service?
When does my car need a tune-up?
Is it Time for New Shocks or Struts?
Top Signs of Alternator Failure
What's that Noise? 4 Sounds that Mean You Need a Repair
This Means Your Need Brake Repair Now
What does that Light Mean? Common Dashboard Warning Lights
4 Signs of a Dangerous Exhaust Leak
4 Routine Auto Services to Never Skip
This Could Mean it is Time for Engine Repair!
5 Auto Maintenance Services Never to be Skip
Terms to Know When Buying New Tires
How to Prepare Your Car for Your Summer Road Trip
What Exactly is a Tune Up?
FAQ: Emissions Testing & Repair
Why is the Check Engine Light On?
Is it Time to Replace the Timing Belt?
5 Smells that Mean it is Time for Auto Repair
Top Symptoms of Brake Failure You Need to Know!
Do These 4 Noises Mean I Need Auto Repair?
Does my car need a new alternator?
How to tell if your Car Needs Clutch Repair
Car Won't Start? 4 Signs Your Starter has Failed
4 Signs your Vehicle Needs Suspension Repair
3 Reasons to Never Skip Oil Changes
5 Signs You Need Transmission Repair
Easy Maintenance Ideas to Improve Fuel Efficiency
5 Reasons Your Car Will Likely Fail an Emissions Test
Common Troubles of the Fuel System
Is it Time for Power Steering Repair?
4 Signs of Cooling System Trouble
10 Tips to Prepare Your Vehicle for Winter
What is Factory Scheduled Auto Maintenance?
The Importance of Tire Maintenance
My Car Won't Start... What's Wrong?
A Guide to Vehicle Fluid Leaks
3 Signs Your Car Needs Engine Repair
5 Signs Your Car Needs Brake Repair