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What is the symbol Malfunction Indicator Lamp?

The Malfunction Indicator Lamp (MIL), also known as the "check engine" light, is a warning light that illuminates on the dashboard of a vehicle to indicate that there is an issue with the vehicle's emissions control system or other engine-related components. This light is an important tool for drivers to be aware of potential problems with their vehicle and take appropriate action.


What is the Malfunction Indicator Lamp?


The Malfunction Indicator Lamp is a dashboard light that is part of a vehicle's on-board diagnostics (OBD) system. The OBD system continuously monitors the various sensors and components in the vehicle's engine and emissions control system, and if it detects a problem, it will trigger the MIL to illuminate.


What Does the MIL Indicate?


When the MIL is illuminated, it means that the vehicle's computer has detected a problem with one or more of the vehicle's systems. This could be related to the engine, transmission, emissions control system, or other components. The specific problem is stored in the vehicle's computer as a diagnostic trouble code (DTC), which can be read by a mechanic using a diagnostic tool.


Why is the MIL Important?


The MIL is an important warning light because it can indicate a problem that, if left unaddressed, could lead to further damage to the vehicle or even a failure to pass emissions testing. Ignoring the MIL can also result in decreased fuel efficiency, increased emissions, and potentially more expensive repairs down the line.


What Should You Do if the MIL is Illuminated?



  • Check the owner's manual for instructions on what to do if the MIL is illuminated.

  • Use a diagnostic tool to read the diagnostic trouble code(s) stored in the vehicle's computer.

  • Take the vehicle to a qualified mechanic to have the problem diagnosed and repaired.

  • Address the problem as soon as possible to avoid further damage or issues.


By understanding the purpose and importance of the Malfunction Indicator Lamp, drivers can stay informed about the health of their vehicle and take appropriate action to address any issues that arise.

What does it mean when the malfunction indicator lamp comes on?


What is the MIL? A dashboard light that comes on when the vehicle's computer finds a problem that could cause excess pollution. Often this means you should repair your vehicle to avoid costly damage in the future.



What is the most common cause of the check engine light?


The most common cause is the oxygen sensor, which measures the oxygen remaining after the air-fuel mixture ignites. If this sensor detects an issue with oxygen use or burns out over time, the check engine light will come on. This issue leads to poor fuel economy and can cause severe engine damage if left unaddressed.



How long can you drive with malfunction light?


50-100 miles
Anyhow, It is a sign that should be addressed in time to avoid any severe damage. The most asked question by vehicle owners is: how long can you drive with the check engine light on? The answer is that you can safely drive from 50-100 miles.



Can I drive with my malfunction indicator lamp on?


Do not delay. Continuing to drive with the check engine light on can potentially cause serious damage and costlier repairs.



How to fix a malfunction indicator?


Finally. It's crucial to address the underlying issue causing the malfunction indicator lamp to illuminate. If you're unsure about the problem or lack the necessary.



Does AutoZone check engine light for free?


We can help you get a reading yourself. Borrow an OBD reader to get a Check Engine Light reading with the AutoZone Free Fix Finder Service. It's a simple task that takes less than two minutes.



What is the reason for the engine malfunction light?


When your car's internal computer identifies a problem with the engine or transmission, it turns on the check engine light. The reasons for a check engine light turning on can range from something minor like a loose gas cap to something more serious like a faulty catalytic converter.



Is it safe to drive with an engine malfunction light?


Steady Light: If the light is steady and not flashing, it's generally safe to continue driving, but you should schedule a diagnostic check as soon as possible. The issue is likely not an emergency, but it could become more serious if left unaddressed.



How much does it cost to fix a malfunction indicator lamp?


Diagnostic fees alone can range from $50 to $200, while repairs can cost anywhere from a few dollars for a loose gas cap to several thousand dollars for more complex problems. If you find yourself facing a check engine light, it's important not to ignore it.



How do I reset my malfunction indicator light?


The on-off method is the equivalent fix for a vehicle's check engine light. It forces the computer to refresh its saved state through a reboot. Simply place your key into the ignition and turn it on for 1-2 seconds, then turn it off for 1-2 seconds. Repeat this step three or four times.


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.