What does it mean when the emission control system light comes on?
As a car owner, seeing the emission control system light illuminate on your dashboard can be concerning. This warning light is an important indicator of your vehicle's health and can signify various issues related to the emission control system. In this article, we will explore what this light means, the potential causes, and what steps you should take if it comes on.
What is the Emission Control System?
The emission control system is designed to reduce the amount of harmful pollutants released into the atmosphere from your vehicle. It includes components such as the catalytic converter, oxygen sensors, and the onboard diagnostic system (OBD). These parts work together to monitor and control the emissions produced by your engine.
What Does It Mean When the Light Comes On?
When the emission control system light activates, it indicates that there is a problem within the system that needs attention. Here are some common reasons why this light may illuminate:
- Faulty Oxygen Sensor: The oxygen sensor measures the amount of unburned oxygen in the exhaust and helps the engine control module adjust the air-fuel mixture. A malfunctioning sensor can lead to increased emissions.
- Issues with the Catalytic Converter: The catalytic converter converts harmful gases into less harmful emissions. If it is clogged or damaged, it can trigger the warning light.
- Loose or Damaged Gas Cap: A loose or cracked gas cap can cause fuel vapors to escape, leading to increased emissions and triggering the light.
- Engine Misfires: If your engine is misfiring, it can lead to incomplete combustion, resulting in higher emissions and the warning light coming on.
- Exhaust Leaks: Leaks in the exhaust system can affect the performance of the emission control system and trigger the light.
What Should You Do If the Light Comes On?
If the emission control system light appears on your dashboard, it is essential to take the following steps:
- Check the Gas Cap: Ensure that your gas cap is tight and undamaged. If it was loose, tightening it may turn off the light after a few driving cycles.
- Monitor Your Vehicle's Performance: Pay attention to any changes in your vehicle's performance, such as decreased fuel efficiency or unusual noises.
- Consult a Professional: If the light remains on, it is advisable to take your vehicle to a trusted auto service center for a diagnostic check. Professionals can use specialized equipment to identify the exact issue.
Conclusion
Understanding the emission control system light is crucial for maintaining your vehicle's performance and ensuring compliance with environmental regulations. By being proactive and addressing any issues promptly, you can help keep your car running smoothly and reduce its environmental impact. If you have any concerns or need assistance, don't hesitate to reach out to a qualified auto service provider.
Frequently Asked Questions
How do you pass emissions with light on?
You Won't Pass Inspection with Check Engine Light On
In any case, never try to pass inspection with check engine light on. Instead, get your vehicle repaired at a Jiffy Lube service center before you head to the emissions test. Usually, even having the MIL illuminated is grounds for a failed test.
How to clean an emission control system?
Add entire bottle of Fuel, Exhaust & Emissions Systems Cleaner into approximately 1/2 full tank car (1/4 full tank truck) of gasoline. Drive vehicle 20 to 30 miles (ideally half of these miles at highway speeds), and then fill up tank. Continue to drive vehicle normally until below 1/4 tank before refueling.
What causes a fault in the emission control system?
Fault 1: Emissions System Fault
If your engine light has been triggered by the oxygen sensor then this can mean your car is running too rich, taking in too much fuel, or too lean, and isn't using enough, it could also be caused by a fault with the sensor itself.
What triggers emissions light?
The emissions/exhaust system is the most likely culprit for many check engine lights being illuminated. There could be an exhaust leak or a problem with the catalytic converter. The mass airflow sensor (MAF) is another sensor that is easily tripped or can fail.
Can AutoZone check emissions light?
AutoZone offers a complimentary Fix Finder service that efficiently diagnoses warning lights, including Check Engine, ABS, and maintenance indicators.
How much does it cost to fix emission control system?
If your vehicle failed emission testing and it needs repairing, then the cost will depend on the exact cause, but the repair work typically starts around $200. Replacing your exhaust system depends on the type of car you drive, but that work starts at approximately $175.
Is emission system serious?
It is not good when there is an emissions problem or exhaust system failure. It can cause performance issues in your engine, potentially leading to costly internal damage. It's also bad for you and the environment when harmful fumes and carbon monoxide are getting out more than they should.
Can I still drive my car if it says emissions system problem?
It's not recommended to drive with the Check Emission System warning light on until you know the cause.
Can you drive with an emission control system light on?
Continuing to drive the truck with a flashing check engine light can potentially cause additional damage to the engine or emission control components. It's essential to pull over safely as soon as possible and have the truck inspected by a qualified mechanic or technician.
How do I fix my emission control system warning light?
Turn the key in the ignition to the 'ON' position. Reconnect the positive battery cable and turn the key in the ignition, wait a few minutes and the CEL should be gone. If neither of these work, it's best to take your vehicle into a garage so that a professional can reset your light.
