Why Is Your Audi’s Check Engine Light On? West Chester Experts Explain

Are you wondering why the CEL is on in your Audi? The check engine light, or CEL as it is sometimes called, is part of your Audi’s onboard diagnostics system, also known as the OBD-II. Whenever there is an issue with the engine, transmission, exhaust, or any other system, error codes are sent by the sensors to the computer. This signal makes the car switch on the check engine light to inform you that there is a problem.

If the light is steady, it is not necessarily an emergency, but it should be looked into. But if you see the light flashing, it means there’s something much more severe happening under the hood and the car should be stopped immediately and checked.

Common Reasons the Check Engine Light Comes On in Audi Vehicles

• Damaged Gas Cap: If the gas cap is loose or damaged, there can be leakage of fuel vapors which will result in the illumination of the light. Fortunately, this is a simple problem that can be solved in a short amount of time. All that is required is to check the cap, and tighten it if necessary.
• Faulty Oxygen Sensor: The oxygen sensor is responsible for measuring the amount of oxygen that is available in the exhaust. If it fails, the engine’s fuel mixture can become less efficient, leading to poor fuel consumption and high emissions, and this can also trigger the check engine light in your Audi.
• Bad Spark Plugs or Ignition Coils: These parts are used to ignite the fuel in the engine. If they wear out or fail, it can lead to misfires and rough idle of the vehicle. A misfire can lead to various problems and could damage the engine in the long run.
• Bad Catalytic Converter: The catalytic converter minimizes the emission of toxic fumes from the car exhaust. When it ceases to function correctly, it will not only illuminate the CEL, but also cause the vehicle to underperform and emit high amounts of pollution.
• Mass Air Flow Sensor Issues: This sensor aids the engine computer in determining the volume of air flowing into the engine. If it is dirty or faulty, then there will be a problem with the fuel mixture which can cause stalling, hesitating, or poor acceleration.
• Vacuum Leaks: Vacuum pressure is used to operate different systems in modern Audis. If there is a crack in the hose or if it is disconnected, it will affect the performance of the engine and turn the check light on.
• Exhaust Gas Recirculation (EGR) Valve Problems: The EGR system is useful for the reduction of emissions. If the valve is stuck or blocked, the car will not run efficiently and the check light will turn on.

How to Respond to the Check Engine Light

When the check light is illuminated, the first thing that should be done is to remain cool and observe the performance of the car. If it is blinking this means that there is a major problem such as an engine misfire and this issue should not be ignored. It is advisable to pull over and get the car towed to a qualified mechanic.

If the light is steady and the car feels fine, it is ok to drive short distances but the car needs to be scanned as soon as possible. A diagnostic scanner will show exactly which trouble code is stored in the car’s computer. From there a proper repair can be made.

Here Is How We Can Help At Dougherty Automotive

Here at Dougherty Automotive Services, we have been providing exceptional auto services to Audi owners in West Chester, PA and the surrounding areas since 1977. We are a family-owned and operated business with many years of experience and we use only factory grade equipment to accurately diagnose and repair your vehicle. If you see the check engine warning light on the dashboard of your Audi and do not know why it came on, our experts are here to help.

Our technician will not just assume, instead, they’ll diagnose the vehicle to find out whether it is just the gas cap or there is something wrong with the engine. After accurate diagnosis, we will ensure that the clients understand the problem and recommend the best solution for your Audi. Bring your Audi to our workshop now and our certified mechanics will fix and resolve the check light issues.