Top 5 Reasons the Check Engine Light is On
For many people the check engine light is a sure sign of expensive repairs ahead. This simply isn't the case, as long as you act quickly when the light comes on. Most check engine light issues start out relatively small and will grow into much larger, and costly problems over time. The following are some of the most common reasons the light comes on, starting with a worst case scenario.
Failed Catalytic Converter
If you find out that the catalytic converter is in need of repair or replacement when you go in for check engine light diagnostics it likely means that light has been on for some time. This part converts hazardous exhaust fumes into less harmful emissions, but can fail if other, easier to fix parts, fail first, which likely would have triggered the check engine light long ago.
Bad O2 Sensor
A failed oxygen sensor can lead to a faulty catalytic convert. This sensor is located in the exhaust system and monitors how much oxygen is in the vehicle's emissions. This measurement helps determine how much fuel to burn. If the sensor fails you'll likely experience a drop in fuel efficiency.
Failed MAF Sensor
On the other end of the car is the mass air flow sensor. This sensor measures incoming air and calculates how much needs to be mixed with the gasoline to ensure a proper running engine. A failed sensor can also lead to the engine running rich, which will lower fuel efficiency and damage the catalytic converter.
Dirty Spark Plugs
The spark plugs in your internal combustion engine need to be replaced as recommended by factory specifications. Dirty or corroded spark plugs will likely lead to misfiring, which causes the engine to run poorly, resulting in poor idling abilities and will allow for the possibility of engine stalling.
Loose/Broken Gas Cap
The best case scenario is finding out that you simply forgot to tighten the gas cap the last time you filled up. Or, your gas cap is broken or cracked. This will cause fuel vapors to evaporate from the tank, causing the EVAP system to trigger the check engine light.
When your check engine light comes on don't hesitate to get to a shop to find out what's up! If you need check engine light diagnostics in Austin the team at Precision Tune Auto Care will get you taken care of. Our full service auto repair shop is staffed by ASE certified techs who work on all makes and models. Give us a call at (512) 580-4826 to schedule an appointment for expert auto repair in Austin! We look forward to helping you get back on the road.
Precision Tune Auto Care Blog
Written and Published By MORBiZ
Does My Car Need Exhaust Repair?
Don't Put Off Brake Repair!
Is it Time for Cooling System Service?
Simple Ways to Damage Your Vehicle's Transmission
Customer Reviews of Precision Tune Auto Care in Austin, TX
What Does the Suspension Do?
Top Signs your Vehicle Needs a Wheel Alignment
You Should Visit the Auto Shop if...
4 Small Issues that Have a Massive Impact Fuel Efficiency
Best Ways to Ensure a Safe Commute
Common Symptoms of General Automotive Trouble
Top Auto Electric Problems
Why Won't My Car Start?
Are Oil Changes Actually Necessary?
Common Signs it is Time for Engine Repair
Top Signs it is Time for Brake Repair
Does my car need radiator repair?
Why Choose Precision Tune Auto Care for Auto Repair in Austin?
Simple Car Services that Improve Fuel Efficiency
4 Automotive Sensors that Help Your Car Run Right
Sounds that Scream "Go to the Auto Repair Shop!"
Does my Car Need Suspension Repairs?
Why is the Check Engine Light On?
Is it time for a tune up?
Keeping Up With Factory Auto Maintenance
Three Common Fuel Delivery Issues
4 Signs Your Vehicle Likely Needs Exhaust Repair
Top Signs of Engine Failure
5 Symptoms of Brake Failure You Must Know
5 Signs it is Time for Auto Repair
What is Leaking from my Car?
Commonly Overlooked Auto Maintenance Tasks
4 Signs Your Car Needs a Wheel Alignment
5 Smells that Could Mean it is Time for Auto Repair
Why are Oil Changes so Important for my Vehicle?
How to Find a Great Auto Repair Shop in Austin
Does my car need clutch repair?
Top Signs of Suspension Trouble
Top 5 Reasons the Check Engine Light is On
Auto Maintenance & Driving Tips to Increase MPGs
Top Causes of a Dead Car Battery
5 Signs of Transmission Failure
5 Symptoms of Cooling System Failure
Does this mean it is time for engine repair?
Top Warning Signs of Brake Failure