4 Common Causes of a Failed Emissions Test
The emissions laws in California are some of the most stringent throughout the US, if not the world. While this is great for our environment is often means that even the slightest errors in our vehicles' emissions system results in the car not passing its bi-annual exam. Fortunately many of the most common emissions control problems are relatively simple fixes. If your vehicle has failed an emissions test don't stress about some absurd repair, there is a good chance it will can be fixed at a relatively affordable price.
Faulty O2 Sensor
A failing oxygen sensor will not be able to properly monitor exhaust fumes in order to help calculate the correct air-fuel mixture to keep the car running right. Not only will a bad sensor lead to a failed emissions test it can also cause overheating, poor acceleration or a loss of engine power.
Rich Fuel Mix
The major pollutant produced by gas burning vehicles is carbon monoxide. If your vehicle is burning too much gasoline, which is called running rich, it will create an increase in this harmful gas and cause the car to fail the test. This issue is often associated with a bad mass air flow sensor.
Bad EVAP System
One of the most common problems that results in a failed test is actually a very simple fix. The Evaporative Emission Control System, or EVAP, prevents gasoline vapors from evaporating and being released into the air but it won't be able to do its job if your car suffers from a broken, cracked or loose gas cap!
Incorrect Fuel Metering
Your vehicle is constantly monitoring fuel fuel use in order to ensure the engine is running smooth. If the fuel injection unit or computerized engine control fails the monitoring will be incorrect which often leads to an excessive amount of fuel use resulting in a failed emissions test.
If your vehicle has failed an emissions test it will need to be serviced by a California smog certified auto repair center before it is retested. For emissions testing or emissions repairs in Corona bring your import or domestic vehicle to Precision Import Auto Repairs. Our friendly, highly skilled team of technicians is here to help keep your car healthy! Call us at (951) 734-0795 to schedule an appointment today!
Precision Import Auto Repairs Blog
Written By Brian Corey
Published By MORBiZ
Simple Driving Tips & Auto Maintenance Tips to Restore Fuel Efficiency
The Primary Automotive Systems
Customer Reviews of Precision Import Auto Repair in Corona, CA
What does the Suspension Do and What are the Signs of Suspension Trouble?
Why does my car battery keep dying?
Is it Time for Transmission Repair?
Understanding Automotive Sensors
Is your Car Ready for Summer Road Trips?
Car won't start? Here's 5 common problems that could be why
4 Common Signs you Need Radiator Repair
If This Happens it's Time for Engine Diagnostics
Top Symptoms of Brake Failure
Is it Time for Exhaust Repair?
Why is the Check Engine Light On?
5 Common Problems with the Saab 9-5
7 Services to Extend the Life of Your Car
How Auto Maintenance Saves you Gas
What are Fluid Flushes and Does My Car Need One?
FAQ: Smog Checks
Vehicle Vibrations that Indicate it is Time for Auto Repair
4 Signs your Car Needs a Wheel Alignment
Why do European Vehicles have so many Computers?
What car problems create weird smells?
Most Common Causes of Engine Failure
4 Signs it is Time for Brake Repair
Top Services of an Import Auto Repair Specialist
What European Countries Sell the Most Cars in the USA?
Common Symptoms your Vehicle is Due for Cooling System Repair
4 Odd Noises that Mean Your Car Needs Auto Repair
Top Qualities of a BMW Dealership Alternative in Corona
How can I get my car ready for summer?
6 Triggers of the Check Engine Light
My car is having weird electrical issues, is there an auto electrician?
What is Scheduled Auto Maintenance?
Top 4 Reasons to Change Your Oil Regularly
4 Common Electrical Problems with the Audi A4
Why won't my car start?
"Braking" it down - 5 signs of brake failure you need to know
3 Sign Your Car Needs Exhaust Repair
Must Know Mini Cooper Issues
Do I need Engine Repair? 4 Signs that Say Yes!
Smart Driving Tips to Increase MPGs
4 Signs it is Time for Manual Transmission Repair
Does my car need a wheel alignment?
Why Won't the AC Blow Cold?
4 Common Problems with BMW e36 Vehicles
4 Known Late Model Mercedes E Class Problems
4 Common Causes of a Failed Emissions Test
Tips to Find a European Auto Repair Shop You can Trust
The Major Signs of Fuel Pump Failure
4 Warning Signs of Brake Failure
Overheating? 3 Signs of a Cooling System Leak
3 Symptoms of Suspension Problems