4 Causes of a Failed Emissions Test
Nearly all vehicles must go through emissions testing on a regular basis in order to be legally licensed. If your car or truck has ever failed an emissions test you understand that it can be a stressful situation, requiring a trip to the mechanic to have the problem attempted to be repaired. But some of the most common issues that cause emissions test failure are generally less expensive than what you are required to spend "trying" to repair whatever issue is at hand. These are four of the most common reasons a vehicle will not pass an emissions test.
Failing EVAP System
The Evaporative Emission Control System (EVAP) prevents gasoline vapors from being released into the air. This system will not be able to function correctly if there is a leak in a connected vacuum hose or if there is a cracked, broken or loose gas cap.
Bad O2 Sensor
If your oxygen sensor malfunctions it can not properly monitor exhaust fumes, which will cause several problems for your vehicle, including a major decrease in fuel efficiency. However, the reasons this causes your vehicle to fail the test is that it can increase the hazardous fumes within your car's exhaust.
Rich Fuel Mixture
If high levels of carbon monoxide are detected in the emissions test your vehicle will not pass, an issue often associated with the burning of too much gasoline. This can happen due to a faulty O2 sensor or Mass Air Flow sensor, or because of leaking fuel injectors.
Bad Fuel Metering
Your vehicle monitors fuel use to ensure that a correct air-fuel mixture is created to keep the engine running smooth. If the computerized engine control or computer aided fuel injection unit fails or malfunctions the monitoring will be incorrect, which will cause the vehicle to fail emissions.
If your car is due for an emissions test or needs emission test repair in Lancaster head to McKonly's Garage. The auto repair technicians at our family owned shop will ensure that your vehicle is safe and legal to drive. To schedule an appointment for full service auto repair in Lancaster don't hesitate to call (717) 208-8210 today.
McKonly's Garage Blog
Written and Published By MORBiZ
What is Leaking From My Car?
When Should I get New Tires?
Top Causes of No Starts
3 Symptoms of a Failing Clutch
Top Triggers of the Check Engine Light
Important Auto Maintenance that Gets Forgotten
Do Not Ignore Brake Trouble
5 Services that Keep Your Car Safe to Drive
5 Reasons to Never Skip Scheduled Auto Maintenance
The Benefits of Modern Computer Diagnostics
Is Your Car Up To Date with Oil Changes?
When was the Last Time your Car had a Wheel Alignment?
Is it Time for Radiator Repair? 3 Things to Check For
Customer Reviews of McKonly's Garage in Lancaster, PA
Top Fuel Delivery Problems
4 Common Signs Your Car Needs Engine Repair
What Happens if You Ignore Signs of Car Trouble?
Expert Auto Repair in Lancaster, PA
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