The check engine light is one of the most important warning indicators in your vehicle. While it might seem like a minor issue at first, ignoring it can lead to costly repairs and potential safety concerns.
At Boundary St Automotive in Townsville, we want to help you understand what the check engine light means, what steps you should take, and how we can assist you in keeping your car running smoothly.

Addressing your check engine light issues promptly can help to prevent costly vehicle repairs and ensure your car remains safe and fuel efficient.
What Does the Check Engine Light Mean?
The check engine light is part of your vehicle’s onboard diagnostics system (OBD). When this light illuminates, it’s your car’s way of telling you that something isn’t functioning as it should. The problem could range from a simple issue, like a loose petrol cap, to more serious concerns such as engine misfires or a failing catalytic converter.
Common Causes of the Check Engine Light
Loose or Faulty Petrol Cap: This is one of the simplest fixes but can still trigger the light.
Oxygen Sensor Failure: Monitors unburned oxygen in the exhaust and helps regulate fuel efficiency.
Faulty Spark Plugs or Ignition Coils: These are essential for your engine’s performance and efficiency.
Catalytic Converter: Issues can lead to increased emissions and reduced fuel economy.
Mass Airflow Sensor Failure: Ensures the correct air-fuel mixture for optimal engine performance.
There are many other issues that can contribute to a check engine light coming on, depending on your vehicle’s make and model. These may include specific sensors or components like the Throttle Position Sensor (TPS) that monitors the throttle plate, the Evaporative Emission System (EVAP) that stores fuel vapors, the Engine Coolant Temperature Sensor (ECT), the Exhaust Gas Recirculation (EGR) valve, and air intake valve problems. Recognising these potential causes and seeking professional help early can prevent more costly repairs.
Don’t ignore your engine light; let our expert Townsville mechanics at Boundary St Automotive diagnose and fix the issue before it escalates.
Immediate Action to Take When Your Engine Light Comes On
Don’t Panic: The light doesn’t necessarily mean an emergency, but it does require attention as soon as possible.
Inspect the Petrol Cap: A loose or damaged cap can trigger the light. Ensure it’s securely fastened.
Observe the Vehicle’s Behaviour: Pay attention to unusual symptoms like reduced power, strange noises, or poor fuel economy. These could indicate a more serious issue.
Avoid Prolonged Driving: Continuing to drive without addressing the problem can lead to more significant damage and costly repairs.
Bring your vehicle to Boundary St Automotive for a thorough inspection. Our experienced technicians use advanced diagnostic tools to pinpoint the exact cause and recommend the best solution.

DON'T IGNORE YOUR VEHICLE'S WARNING SIGNS
Why Prompt Action Matters When Your Engine Light is On
Ignoring the check engine light can result in:
Increased Repair Costs: Minor issues can escalate into major repairs if left unchecked. For example, a failing oxygen sensor can damage the catalytic converter, leading to a much more expensive fix.
Reduced Fuel Efficiency: Many problems that trigger the check engine light can decrease your car’s mileage, costing you more at the pump.
Safety Risks: Some issues, like engine misfires, can compromise your vehicle’s reliability and safety.
Failed Emissions Tests: In Queensland, cars must meet specific environmental standards. A persistent check engine light may cause your vehicle to fail a Roadworthy Inspection.
Can I Still Drive with the Check Engine Light On?
Driving with the check engine light on depends on the severity of the issue. If the light comes on and stays steady, yet everything seems to be functioning normally, you may be able to continue driving, although it is important to schedule an appointment to have the issue properly diagnosed and repaired as quickly as possible.
If the light starts flashing, it’s a sign of something more serious. Pay attention to any unusual noises, reduced power, or signs of overheating, like smoke coming from the engine. When the light is flashing, it’s strongly advised that you avoid driving the vehicle to prevent further engine damage and expensive repairs.
Fault Diagnosis by Experienced Townsville Mechanics
At Boundary St Automotive, we specialise in diagnosing and repairing check engine light issues for drivers in Townsville and the surrounding areas. Here’s how we can assist:
Advanced Diagnostics: Our advanced tools allow us to quickly identify the exact cause of the problem.
Expert Repairs: From simple fixes to complex repairs, our qualified mechanics have the skills to get your car back on the road safely.
Preventative Maintenance: Regular servicing can help prevent check engine light issues before they occur. Book your next car service with us to keep your vehicle in peak condition.
Your engine light is more than just a warning; it’s an opportunity to address potential problems before they worsen. At Boundary St Automotive, we’re committed to providing the best car servicing and repairs in Townsville. Whether it’s a loose petrol cap or a more serious issue, our team is here to help.
Boundary St Automotive are an Authorised Repco Service Centre with a Nationwide Warranty covered in over 500 locations across Australia, so you know you’re in good hands.
Book an inspection today by calling us or visiting our workshop. Don’t let a small issue turn into a costly repair – trust Boundary St Automotive to keep your car running smoothly and safely.