Audi Check Engine Light Comes On: What Are The Reasons?

The orange, engine-shaped icon that sometimes turns on isn’t a nuisance. Indeed, it’s a sign of something wrong with the engine components.

So, when Audi check engine light turns on, remember that it’s pointing towards a component that either is screaming for immediate repair or replacement.

Top 5 Reasons of Audi Check Engine Light in ON

When suddenly the check engine light switches on, the most comfortable car like Audi also sets off the panic.

However, without thinking about the worst conditions pointing towards the activated check engine light, simply find the component associated with the cause.

1. Spark Plug Or Plug Wires

The spark plug receives electricity from the plug wire. In case of bad spark plug wires, a tremendous drop in gas mileage and engine performance is noticed that demands its replacement.

Even the worn out or damaged spark plugs can cause random jolts of acceleration, indicating a misfire in the combustion chamber.

2. Catalytic Converter

Responsible for converting carbon monoxide into the carbon dioxide generated during the combustion process, it’s wise to follow its maintenance tips for preventing any sort of failure.

In case the catalytic converter gets clogged, you may hear unusual sounds and notice emission of discolored smoke from the exhaust.

Affecting both the gas exhilaration and mileage, the problem with this component usually turns on the Audi check engine light.

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3. Gas Cap

During a loose gas cap, the fuel vapors leak out from the cap into the atmosphere. This increases the health as well as emissions problems. 

Also, reducing gas mileage, if while tightening the gas cap one notices the faulty cap, then its repair or replacement is the only solution left in hand.

4. Mass Airflow Sensor

Undoubtedly, your car needs a mass airflow sensor to run smoothly. Measuring the barometric pressure, air entering the combustion’s system, and humidity, it works with the oxygen sensor.

Failing to perform normally, the car will find it difficult to adjust with the changes in altitude and other outside road conditions. 

Moreover, it will reduce the gas mileage by 25 percent. Additionally, the failure symptoms may sound similar to the ones observed with spark plugs. 

Therefore, you must seek help from a professional, who can locate the actual cause of the problem and treat it timely.

5.Oxygen Sensor

The component works along with the MAF and monitors the unburned oxygen. Also, assisting in the unburnt fuel measurement, if the part is damaged- it may provide inaccurate data to the computer. As a result, the gas mileage will decrease.

Moreover, the faulty oxygen sensor leads to irreparable damage for which you will be obliged to pay a hefty price. 

The main reason for its failure is oil ash that covers the sensor and reduces the ability to change fuel mixture and oxygen.

FAQs

1. Can I continue driving my Audi if the check engine light comes on?

While it might be safe to drive for a short distance, it’s crucial to address the issue promptly. Ignoring the check engine light can lead to more significant problems. 

If the light is flashing, it indicates a more severe issue, and you should stop driving immediately to avoid damage.

2. What are common reasons for the check engine light to come on in an Audi?

Common reasons include issues with the oxygen sensor, catalytic converter, mass airflow sensor, ignition coils, spark plugs, or fuel cap. Each of these components plays a vital role in your vehicle’s performance and emissions system.

3. How can I find out the exact reason my check engine light is on?

The most effective way to diagnose the issue is by using an OBD-II (On-Board Diagnostics) scanner. This tool can read the specific error code generated by your vehicle’s computer system, pinpointing the problem area.

4. Can a loose gas cap really trigger the check engine light?

A loose or damaged gas cap can cause the check engine light to come on. It affects the fuel system pressure and can lead to fuel vapor leaks, which are harmful to the environment and can reduce your car’s fuel efficiency.

5. Will my check engine light turn off by itself if I fix the issue?

In some cases, the light may turn off after you’ve addressed the issue, especially for minor problems. However, for some repairs, the light may remain on until the error codes are cleared using an OBD-II scanner.

6. Is it expensive to fix the issues causing my check engine light to come on?

The cost can vary widely depending on the root cause. Simple fixes like tightening a gas cap are inexpensive, while more complex issues like replacing a catalytic converter can be costly.

7. What should I do if my Check engine light comes on before an emissions test?

If your check engine light is on, your vehicle is likely to fail the emissions test. It’s advisable to have the issue diagnosed and repaired before taking the test.

8. How urgent is it to address a check engine light?

It depends on the nature of the problem. A steady light suggests you should check it out soon, but a flashing light indicates a more serious issue that requires immediate attention to prevent damage to your vehicle.

Check out this video from Luke’s Whips to learn more about common Audi check engine light solution!

So in the end, after knowing what causes Audi check engine light turns on, hope you can locate the problem and get it repaired immediately.