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Is it safe to drive with the emission control light on?

The short answer is no, it is generally not safe to drive with the emission control light on. The emission control light, also known as the check engine light, indicates a problem with the vehicle's emissions system, which can have serious consequences if ignored.


Understanding the Emission Control Light


The emission control light is part of a vehicle's on-board diagnostics (OBD) system, which monitors the performance of various components related to emissions and engine function. When the OBD system detects a problem, it triggers the emission control light to illuminate on the dashboard, alerting the driver to an issue that needs attention.


The emission control light can be triggered by a wide range of problems, including faulty sensors, malfunctioning catalytic converters, or issues with the fuel system. These problems can not only affect the vehicle's emissions, but also its overall performance and fuel efficiency.


Risks of Driving with the Emission Control Light On


Driving with the emission control light on can be risky for several reasons:



  • Increased Emissions: The problem that triggered the emission control light is likely causing the vehicle to produce higher levels of harmful emissions, which can be detrimental to the environment and public health.

  • Reduced Fuel Efficiency: The underlying issue may be causing the engine to run less efficiently, leading to decreased fuel economy and higher fuel costs.

  • Potential Damage to the Vehicle: Ignoring the emission control light can allow the underlying problem to worsen, potentially leading to more expensive repairs or even permanent damage to the vehicle's engine or emissions system.


In some areas, driving with the emission control light on may also be illegal, as it can be considered a violation of environmental regulations.


What to Do If the Emission Control Light Is On


If the emission control light illuminates on your dashboard, it's important to take the following steps:



  • Scan for Diagnostic Codes: Use an OBD-II scanner or take the vehicle to a mechanic to have the diagnostic codes read. These codes can provide valuable information about the specific problem that triggered the light.

  • Address the Underlying Issue: Once the problem has been identified, it's important to have it repaired as soon as possible. This may involve replacing faulty sensors, addressing issues with the fuel system, or repairing the catalytic converter.

  • Reset the Emission Control Light: After the problem has been resolved, the emission control light should be reset. This can typically be done by disconnecting the vehicle's battery for a short period of time or by using a diagnostic tool.


By taking these steps, you can ensure that your vehicle is operating safely and efficiently, while also minimizing the environmental impact of its emissions.

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 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.



Is the 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.



Is it okay to drive a car with an emissions light on?


Most of the time, it is safe to drive when the emissions light is ON. If emissions light are ON, but there is no issue with the smooth operation of the car, you need not worry about anything!



What to do if an emission light comes on?


A solid glow tells you that you should have your vehicle inspected soon, however a blinking CEL is a greater cause for concern and indicates that your vehicle should be inspected by a professional immediately.



How to fix emissions control light?


Diagnosing & Fixing the Problem

  1. Tighten or change your gas cap. Check the rubber seal on the inside of the gas cap to make sure there aren't any cracks or damage.
  2. Replace your air filter.
  3. Change faulty oxygen sensors.
  4. Take your vehicle to a mechanic.



Is check emissions light serious?


Some common issues that trigger the warning light include a loose gas cap, a clogged air filter, a bad catalytic converter, a failing oxygen sensor, and other faulty engine sensors. You can still drive with an illuminated check emission light, but it's not recommended as it could lead to engine damage.



How long can you drive with the check emission system light on?


The answer is it is safe to drive from 50-100 miles. To maintain your car's health, it is always better to get it checked immediately when you see the check engine light.



Are emissions problems serious?


Having an emissions issue is not only bad for the environment and makes it hard to breath, it can also decrease your vehicle's fuel efficiency and cause other issues. It's important to pay attention to signs of vehicle emissions issues, even when you don't have an emissions test coming up.



How much does it cost to fix an 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.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.