Based on various sources, the average spending on car repairs by Americans varies. Kelley Blue Book indicates an average of $548.32, while AAA suggests an annual maintenance cost of about $800, equivalent to approximately $66 per month.

A 2019 Harris Poll survey estimates an annual expenditure of around $397 on car repairs and maintenance.

Over the years from 2014 to 2019, Ally Financial found that Americans, on average, spent $1,986 on car repairs and routine maintenance, translating to about $400 per year.

Car troubles can be a hassle, and the check engine light is a frequent source of concern for many drivers.

This article will cover the key reasons behind the flashing check engine light, along with tips on how to reset it and practical solutions to address common issues. Stay informed to keep your vehicle running smoothly!

Before we delve into the guide, it's crucial to emphasize that safety is our number one priority. When working on any car-related issues, it's essential to follow proper safety precautions to ensure a secure and hazard-free environment.

If you find yourself unable to proceed with the fixes, it's strongly recommended to take your vehicle to a mechanic shop.

To avoid potential scams at mechanic shops, consider investing in a FIXD device to check error codes before taking your vehicle in for repairs.

10 Common Reasons Why Your Check Engine Light is Flashing

1. Loose Gas Cap: A common culprit triggering the check engine light. Ensure your gas cap is securely tightened.

2. Faulty Oxygen Sensor: Monitors fuel-to-air ratio; a malfunction can affect fuel efficiency and emissions.

3. Faulty Spark Plugs or Ignition Coils: Impacts engine performance, causing misfires and triggering the light.

4. Malfunctioning Mass Air Flow Sensor: Affects air intake calculations, impacting engine performance and fuel efficiency.

5. Issues with Catalytic Converter: Can result in reduced performance and increased emissions.

6. Failing Ignition Coil: Leads to misfires and poor engine performance.

7. Faulty Battery or Charging System: Weak battery or charging issues can trigger the light.

8. Problematic Exhaust Gas Recirculation (EGR) Valve: Affects emissions and overall engine performance.

9. Vacuum Leak: Disrupts the air-to-fuel ratio, impacting engine performance.

10. Faulty Thermostat: Engine temperature regulation issues can trigger the check engine light.

Let's delve into each of these common reasons for a flashing check engine light and explore effective fixes along with ways to reset the system.

1. Loose Gas Cap (Follow the Steps Below to Resolve It)

If your check engine light is illuminated due to a loose gas cap, resolving this issue is relatively straightforward. Follow these steps to fix it:

1. Identify the Gas Cap: Locate the gas cap on your vehicle. It is typically found behind the fuel door on the side of the car.

2. Remove the Gas Cap: Unscrew the gas cap counterclockwise until it is completely loose. Gently pull it away from the fuel filler neck.

3. Inspect the Gas Cap: Check the gas cap for any visible signs of damage, cracks, or wear. Ensure the rubber seal is intact.

4. Tighten the Gas Cap: Place the gas cap back onto the fuel filler neck and turn it clockwise until you hear a clicking sound. This indicates that the cap is securely tightened.

5. Check for Resistance: Attempt to turn the gas cap a bit further to ensure resistance, indicating a snug fit.

6. Restart Your Vehicle: Start your car and allow the engine to run for a few minutes. If the issue was indeed a loose gas cap, the check engine light should turn off on its own after a few driving cycles.

By following these simple steps, you can address the loose gas cap issue and potentially prevent the need for further repairs.

Using a tool like the FIXD OBD2 scanner can help you figure out car issues, like a loose gas cap. This scanner gives real-time information, making it easier to understand and fix the problem.

It's handy when visiting a mechanic, preventing overcharging and keeping you informed about necessary repairs, even for simple things like securing the gas cap.

2. Faulty Oxygen Sensor (Follow the Steps Below to Resolve It)

A faulty oxygen sensor can wreak havoc on your vehicle's performance and fuel efficiency, triggering the dreaded check engine light. Follow the steps below to fix the faulty oxygen sensor issue.

1. Identify the faulty sensor: Use an OBD2 scanner to pinpoint which oxygen sensor needs attention.

2. Locate the sensor: Depending on your vehicle, find the oxygen sensor in the exhaust system.

3. Disconnect the battery: For safety, disconnect the car battery before proceeding with any repairs.

4. Remove the old sensor: Unplug the sensor and use the appropriate tool to take it out.

5. Install the new sensor: Place the new oxygen sensor in the same position and secure it tightly.

6. Reconnect the battery: Once the new sensor is in place, reconnect the car battery.

7. Clear error codes: Use an OBD2 scanner to erase any error codes stored in the system.

8. Test drive: Take your car for a test drive to ensure the issue is resolved.

Be cautious: If you're unsure or uncomfortable with these steps, consult a professional mechanic. Your safety and the proper functioning of your vehicle are top priorities.

3. Faulty Spark Plugs or Ignition Coils (Follow the Steps Below to Resolve It)

When your vehicle experiences issues like misfiring, rough idling, or a drop in fuel efficiency, faulty spark plugs or ignition coils might be the culprits. Here's a straightforward guide to address this problem.

Cost of Replacement:

On average, the cost to replace spark plugs or ignition coils can range from $100 to $300, depending on your vehicle's make and model. Labor costs may vary based on where you take your car for repairs.

Steps to Resolve the Issue:

1. Identify the faulty component: Use an OBD2 scanner or seek professional help to pinpoint the problematic spark plug or ignition coil.

2. Gather the necessary tools: You may need a socket set, spark plug gap tool, and dielectric grease.

3. Disconnect the battery: Ensure your safety by disconnecting the negative terminal of the battery.

4. Remove the spark plug wires or ignition coils: This varies based on your vehicle's configuration.

5. Inspect and replace: Check for signs of wear or damage on the spark plugs or ignition coils. Replace as needed.

6. Apply dielectric grease: A thin layer on the spark plug boot can help prevent moisture.

7. Reassemble and reconnect: Put everything back in place and reconnect the battery.

8. Clear the codes: Use an OBD2 scanner to clear the error codes and see if the issue is resolved.

Be Cautious:Remember, if you're uncertain or uncomfortable with these steps, seek professional assistance. Working on the ignition system requires care and precision.

4. Mass Airflow Sensor (Follow the Steps Below to Resolve It)

When your car exhibits symptoms like poor acceleration, rough idling, or stalling, a malfunctioning Mass Airflow Sensor (MAF) might be the cause. Here's a step-by-step guide to help you tackle this issue.

Cost of Replacement:

On average, replacing a Mass Airflow Sensor can cost between $80 and $300, depending on the vehicle's make and model. Labor costs may vary based on the service provider.

Steps to Resolve the Issue:

1. Locate the MAF sensor: Refer to your vehicle's manual to find the Mass Airflow Sensor's position.

2. Disconnect the battery: Ensure your safety by disconnecting the negative terminal of the battery.

3. Remove the MAF sensor: Typically secured by screws or clamps. Use the appropriate tools for removal.

4. Inspect for debris or damage: Check for any dirt, debris, or damage on the MAF sensor. Clean gently if needed, or replace if damaged.

5. Install the new sensor: Carefully place the new Mass Airflow Sensor in its position.

6. Reconnect the battery: Restore power by reconnecting the negative terminal.

7. Clear error codes: Use an OBD2 scanner to clear any error codes and assess if the issue persists.

5. Catalytic Converter Issues (Follow the Steps Below to Resolve It)

When your car experiences reduced acceleration, poor fuel efficiency, or rattling noises, a malfunctioning Catalytic Converter could be the culprit. Here's a step-by-step guide to help you address this issue.

Cost of Replacement:

Replacing a Catalytic Converter can be a substantial expense, ranging from $300 to $2,500, depending on your vehicle's make and model. Labor costs vary and may influence the overall expense.

Steps to Resolve the Issue:

1. Identify the Catalytic Converter: Consult your vehicle's manual to locate the Catalytic Converter.

2. Safety precautions: Ensure the car is on a stable surface, and use safety gear, including gloves and eye protection.

3. Disconnect the battery: For safety, disconnect the negative terminal of the battery.

4. Remove heat shields and bolts: Unbolt the heat shields covering the Catalytic Converter and detach the bolts securing it.

5. Replace the Catalytic Converter: Install a new one by securing it with the appropriate bolts.

6. Reattach heat shields: Ensure the heat shields are correctly fastened.

7. Reconnect the battery: Restore power by reconnecting the negative terminal.

8. Clear error codes: Use an OBD2 scanner to clear any error codes and evaluate if the issue persists.

If you're uncertain or uncomfortable with these steps, seek assistance from a professional mechanic. Catalytic Converters involve intricate components, and improper handling may lead to further damage or safety hazards.

6. Failing Ignition Coil (Follow the Steps Below to Resolve It)

If your car experiences rough idling, misfires, or a decrease in fuel efficiency, a failing ignition coil might be the cause. Here's a simple guide to help you troubleshoot and resolve the issue.

Cost of Replacement:

The cost to replace an ignition coil ranges from $100 to $400, including parts and labor. Prices may vary based on your vehicle's make and model.

Steps to Resolve the Issue:

1. Locate the Ignition Coil: Refer to your car's manual to identify the location of the ignition coil.

2. Safety Precautions: Park the car on a flat surface and use safety gear, including gloves and eye protection.

3. Disconnect the Battery: Safely disconnect the negative terminal of the battery.

4. Access the Ignition Coil: Remove any components obstructing access to the ignition coil.

5. Unplug and Remove the Faulty Coil: Disconnect the wiring harness and unbolt the ignition coil.

6. Install the New Ignition Coil: Attach the new ignition coil and secure it with the appropriate bolts.

7. Reconnect Wiring and Components: Reattach the wiring harness and any components you removed.

8. Reconnect the Battery: Restore power by reconnecting the negative terminal.

9. Start the Engine: Ensure the engine starts smoothly and observe for any improvement in performance.

Your safety is important. If you're unsure, get professional help. Working with ignition parts needs precision and mistakes can be risky.

7. Faulty Battery (Follow the Steps Below to Resolve It)

If you find your car struggling to start, dimming headlights, or electrical issues, a failing battery might be the culprit. Follow this step-by-step guide to troubleshoot and resolve the problem.

Cost of Replacement:

Replacing a car battery typically costs between $50 and $200, depending on the battery type and your vehicle's make and model.

Steps to Resolve the Issue:

1. Safety Precautions: Park your car on a flat surface, wear safety gear like gloves and eye protection.

2. Locate the Battery: Consult your car manual to find the battery's location.

3. Disconnect the Battery: Start by disconnecting the negative terminal, followed by the positive terminal.

4. Remove the Old Battery: Loosen the clamps and carefully lift out the old battery.

5. Clean Battery Terminals: Use a wire brush to clean any corrosion from the terminals.

6. Install the New Battery: Place the new battery in position and secure it with the clamps.

7. Reconnect Terminals: Attach the positive terminal first, followed by the negative terminal.

8. Secure the Battery: Ensure the battery is tightly secured in place.

9. Start the Engine: Turn on the car to check if the issue is resolved.

If your engine is acting up and you see that pesky check engine light, a faulty car battery might be the issue.

Before you rush to the mechanic and risk overpaying, try using FIXD. It's a handy tool that can pinpoint the issue, saving you from unnecessary expenses. Stay informed, stay in control

8. Exhaust Gas Recirculation (EGR) Valve Problem (Follow the Steps Below to Resolve It)

If your vehicle is showing signs of rough idling, misfires, or decreased fuel efficiency, a malfunctioning Exhaust Gas Recirculation (EGR) valve might be the cause. Here's a straightforward guide to assist you in identifying and resolving this issue.

Cost of Replacement:

According to Consumer-Champion the cost to replace an EGR valve varies, ranging from $150 to $300, inclusive of parts and labor. Prices may differ depending on your car's make and model.

Steps to Resolve the Issue:

1. Locate the EGR Valve: Consult your car's manual to find the EGR valve's location.

2. Safety Precautions: Park your car on a flat surface and use safety gear like gloves and eye protection.

3. Disconnect the Battery: Safely detach the negative terminal of the battery.

4. Access the EGR Valve: Remove any components blocking access to the EGR valve.

5. Unplug and Remove the Faulty Valve: Disconnect the wiring harness and unbolt the EGR valve.

6. Install the New EGR Valve: Attach the new EGR valve and secure it with the appropriate bolts.

7. Reconnect Wiring and Components: Reattach the wiring harness and any components you removed.

8. Reconnect the Battery: Restore power by reconnecting the negative terminal.

9. Start the Engine: Ensure the engine starts smoothly and observe for any improvement in performance.

If you're uncertain about these steps, it's advisable to seek professional assistance. Handling emission components requires precision, and incorrect procedures may lead to further issues or safety risks.

9. Vacuum Leak (Follow the Steps Below to Resolve It)

If your car seems off with rough idling, misfires, or less efficient fuel use, a possible vacuum leak might be to blame. This guide is here to make finding and fixing this issue easier for you.

Cost of Replacement:

Repair expenses for a vacuum leak in your vehicle's system can vary widely, ranging from $150 to $1,000, according to J.D. Power. The specific cost depends on the location and severity of the leak.

Steps to Resolve the Issue:

1. Locate the Vacuum Leak: Refer to your car's manual to identify where the vacuum leak is situated.

2. Safety First:Park your car on a flat surface and don safety gear like gloves and eye protection.

3. Disconnect the Battery:Carefully detach the negative terminal of the car battery.

4. Access the Leak: Remove any obstacles preventing access to the vacuum leak.

5. Fix the Leak:Identify and address the leak using appropriate measures.

6. Reassemble: Put back any parts you removed during the process.

7. Reconnect the Battery: Restore power by reconnecting the car battery's negative terminal.

8. Test the Engine: Start the engine and observe for any improvement in performance.

10. Faulty Thermostat (Follow the Steps Below to Resolve It)

If your vehicle is experiencing issues like overheating or inconsistent temperature readings, a malfunctioning thermostat might be the culprit. Follow this simple guide to troubleshoot and resolve the problem.

Cost of Replacement:

As per HomeAdvisor, repairing a thermostat comes with an average price tag ranging from $112 to $311, with a national average cost of $211. The precise amount hinges on factors such as the thermostat model and whether it is covered by a warranty.

Steps to Resolve the Issue:

1. Locate the Thermostat: Refer to your car's manual to identify the thermostat's location.

2. Safety Measures: Ensure your car is parked on a flat surface and use safety gear such as gloves and eye protection.

3. Disconnect the Battery: Safely detach the negative terminal of the car battery.

4. Access the Thermostat: Remove any components that may obstruct access to the thermostat.

5. Remove the Faulty Thermostat: Disconnect the wiring and unbolt the faulty thermostat.

6. Install the New Thermostat: Attach the new thermostat securely using the appropriate bolts.

7. Reconnect Wiring and Components: Reattach the wiring and any components you removed.

8. Reconnect the Battery: Restore power by reconnecting the car battery's negative terminal.

9. Start the Engine:Ensure the engine starts smoothly and observe for any improvement in performance.

If uncertain about these steps, seek professional assistance. Handling engine components requires precision, and incorrect procedures may lead to further issues or safety risks.

Conclusion

In conclusion, understanding the reasons behind a flashing check engine light is crucial for maintaining your vehicle's health.

Each issue mentioned has its unique symptoms and potential impacts on your car's performance. While this guide provides insights into common problems, it's important to approach vehicle diagnostics with caution. I

if you're unsure about resolving these issues yourself, seeking professional assistance is advisable. Remember, prompt attention to your check engine light can prevent further damage and ensure a smoother, safer driving experience.