What does it mean when the emission control system light comes on?
The emission control system light, also known as the check engine light, is an indicator on your vehicle's dashboard that illuminates when the onboard diagnostic system detects an issue with the emissions control system. This light serves as a warning to the driver that there is a problem that needs to be addressed.
Understanding the Emission Control System
The emission control system in a vehicle is responsible for reducing the amount of harmful pollutants released into the environment through the vehicle's exhaust. This system includes various components, such as the catalytic converter, oxygen sensors, and the engine control module, that work together to monitor and regulate the vehicle's emissions.
Reasons the Emission Control System Light May Illuminate
- Malfunctioning Catalytic Converter: The catalytic converter is a critical component of the emission control system, and a problem with it can cause the light to turn on.
- Faulty Oxygen Sensors: Oxygen sensors monitor the air-fuel mixture in the engine and provide feedback to the engine control module. If one or more of these sensors is not functioning correctly, the light may illuminate.
- Issues with the Engine Control Module: The engine control module is the "brain" of the vehicle, and if it detects a problem with the emission control system, it will trigger the warning light.
- Loose or Damaged Fuel Cap: A loose or damaged fuel cap can cause the emission control system to malfunction, leading to the illumination of the warning light.
When the emission control system light comes on, it's important to have the vehicle inspected by a qualified mechanic as soon as possible to diagnose and address the underlying issue. Ignoring the warning light can lead to further damage to the vehicle's emission control system and potentially result in higher emissions and decreased fuel efficiency.
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.
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.
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.
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.
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.
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.
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.
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.
