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What does a spanner warning light mean?

The spanner warning light, also known as the service engine soon light or check engine light, is an indicator on your vehicle's dashboard that illuminates when the onboard computer detects an issue with the engine or other components. This light serves as an early warning system, alerting you to potential problems that require attention.


What the Spanner Warning Light Indicates


The spanner warning light can be triggered by a wide range of issues, from minor problems to more serious malfunctions. Some common causes of the spanner warning light include:



  • Faulty oxygen sensors

  • Loose or damaged fuel cap

  • Malfunctioning catalytic converter

  • Problems with the engine's ignition system

  • Emissions control system issues

  • Transmission problems

  • Malfunctioning engine sensors


When the spanner warning light illuminates, it's important to have the issue diagnosed and addressed as soon as possible to prevent further damage to your vehicle and ensure it continues to run safely and efficiently.


Diagnosing and Addressing the Issue


To diagnose the problem causing the spanner warning light, you'll need to have the vehicle's onboard diagnostic system scanned for trouble codes. This can be done at most auto parts stores or by a professional mechanic. The trouble codes will provide information about the specific issue that triggered the warning light, allowing you to take the appropriate steps to resolve the problem.


Once the issue has been identified, you can either attempt to fix it yourself (if it's a minor problem) or take the vehicle to a mechanic for repair. Ignoring the spanner warning light can lead to more serious and costly problems down the road, so it's important to address the issue as soon as possible.

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.