What Does It Mean When The Check Engine and Brake Light Are On Subaru?

The check engine and brake light illuminating simultaneously in your Subaru indicates a potential issue with the vehicle’s engine, braking system, or related components. Addressing these warnings promptly is crucial to prevent further damage and maintain safety; CAR-TOOL.EDU.VN offers resources to diagnose and rectify these problems. Explore our comprehensive guides on troubleshooting automotive malfunctions and preventative maintenance to keep your Subaru running smoothly and efficiently.

1. Why Are My Check Engine and Brake Light On Simultaneously in My Subaru?

When both the check engine and brake lights illuminate together on your Subaru, it generally indicates a more complex issue than either light appearing alone. This could point to a problem affecting multiple systems or a critical fault that requires immediate attention. CAR-TOOL.EDU.VN advises that such occurrences should prompt a thorough diagnostic check to identify the root cause and prevent potential safety hazards. Addressing this promptly can help maintain your vehicle’s reliability and safety.

1.1. What Are the Common Causes for This Issue?

Several factors can trigger the check engine and brake lights simultaneously in a Subaru:

• Electronic Parking Brake (EPB) Issues: Problems within the EPB system can trigger both lights.
• Brake System Malfunctions: Low brake fluid, worn brake pads, or issues with the ABS system.
• Engine Control Unit (ECU) Problems: An ECU malfunction can cause erratic readings and trigger multiple warning lights.
• Sensor Failures: Faulty sensors related to the engine or brake system can send incorrect data, activating the lights.
• Transmission Problems: Some transmission issues can indirectly affect the engine and braking systems.
• Loose Gas Cap: Although seemingly minor, a loose gas cap can trigger the check engine light, and if coupled with another issue, the brake light might also appear.
• Faulty Wiring: Damaged or corroded wiring can cause short circuits or communication errors between systems.

1.2. Can a Loose Gas Cap Cause Both Lights to Turn On?

A loose gas cap is more commonly associated with triggering the check engine light due to evaporative emission system leaks. While it is less likely to directly cause the brake light to illuminate, a persistent issue with the gas cap can sometimes lead to other system errors that might indirectly trigger both lights. According to the Environmental Protection Agency (EPA), maintaining a properly sealed fuel cap is essential for reducing emissions and ensuring optimal engine performance. Always ensure your gas cap is correctly tightened after refueling.

1.3. What Role Does the Electronic Parking Brake (EPB) Play?

The Electronic Parking Brake (EPB) is an advanced system that replaces the traditional mechanical handbrake with an electronic switch. This system, according to a study by the National Highway Traffic Safety Administration (NHTSA), enhances safety and convenience by providing more precise and reliable parking brake engagement. When the EPB malfunctions, it can trigger both the check engine and brake lights, indicating a need for immediate inspection and repair. Subaru TSB 60-40-11R addresses updated diagnostic techniques when the EPB or brake warning lights are on, emphasizing the importance of proper maintenance and diagnostics to ensure the EPB system functions correctly.

1.4. How Do Brake System Issues Affect These Lights?

Brake system issues, such as low brake fluid, worn brake pads, or malfunctions in the Anti-lock Braking System (ABS), can directly trigger the brake light. If these issues also affect engine performance or emissions, the check engine light may also illuminate. CAR-TOOL.EDU.VN emphasizes that regular brake system inspections and maintenance are vital for safety and preventing simultaneous warning light activation.

1.5. What Is the Significance of Sensor Failures?

Sensor failures in modern vehicles can lead to a cascade of issues, as these components provide critical data to the ECU. When a sensor fails, the ECU receives incorrect information, which can affect engine performance, emissions, and braking systems. For instance, a faulty oxygen sensor can trigger the check engine light, while a wheel speed sensor issue can activate the brake light. According to a study by the Society of Automotive Engineers (SAE), accurate sensor data is crucial for optimal vehicle operation and safety. Regular sensor checks and replacements, as recommended by CAR-TOOL.EDU.VN, can prevent these problems.

1.6. How Do Transmission Problems Connect to These Warning Lights?

Transmission problems can indirectly cause the check engine and brake lights to come on. Issues such as slipping gears, delayed engagement, or internal mechanical failures can affect the engine’s performance and emissions, triggering the check engine light. Additionally, some transmission issues can interfere with the ABS or stability control systems, leading to the brake light activating. Subaru TSB NUMBER: 16-80-11R addresses that if encountering a vehicle with the oil temperature warning lamp flashing with specific codes stored in memory, it may be the result of contamination in the valve body, emphasizing the importance of addressing these transmission-related issues to prevent further complications.

2. Diagnosing the Problem: What Steps Should I Take?

When the check engine and brake lights come on together in your Subaru, a systematic approach is necessary to diagnose the problem effectively. CAR-TOOL.EDU.VN recommends these steps to identify and address the underlying issues, ensuring your vehicle’s safety and performance.

2.1. How Do I Check the Error Codes?

Checking the error codes is the first step in diagnosing the issue. You can use an OBD-II scanner to retrieve these codes from your Subaru’s ECU. Modern scanners, as reviewed by Consumer Reports, provide detailed information about the problem, helping you narrow down potential causes. Here’s how to do it:

1. Locate the OBD-II Port: Usually found under the dashboard on the driver’s side.
2. Plug in the Scanner: Connect the scanner to the OBD-II port.
3. Turn on the Ignition: Turn the key to the “ON” position without starting the engine.
4. Read the Codes: Follow the scanner’s instructions to read the stored error codes.

2.2. What Are Common OBD-II Codes Associated with This Issue?

Several OBD-II codes are commonly associated with the simultaneous illumination of the check engine and brake lights:

• P0000-P0999: Powertrain Codes (Engine and Transmission)
  • P0751, P0756, P0761, P0766, P0771, P1840, P1841, P1842, P1843 and/or P1844: These codes relate to transmission solenoid issues, indicating potential problems within the valve body or related components. According to Subaru TSB NUMBER: 16-80-11R, these codes may be the result of contamination in the valve body, suggesting the need for a transmission flush and dynamic check mode.
• C0000-C0999: Chassis Codes (Braking System, ABS)
  • C0051: Brake Pressure Sensor Malfunction, indicating issues with the brake pressure sensor.
  • C0054: Brake Switch Circuit Malfunction, suggesting a problem with the brake light switch.
• B0000-B0999: Body Codes (Electronic Parking Brake)
  • B2900: EPB System Fault, indicating a malfunction within the electronic parking brake system.
• U0000-U0999: Network Communication Codes
  • U0122: Lost Communication with Vehicle Dynamics Control Module, suggesting a communication issue with the ABS or stability control systems.

2.3. How Can I Inspect the Brake System?

Inspecting the brake system involves checking several key components to ensure they are functioning correctly:

1. Check Brake Fluid Level: Ensure the brake fluid is at the proper level in the master cylinder.
2. Inspect Brake Pads: Check the thickness of the brake pads. If they are worn thin, they need to be replaced.
3. Examine Brake Lines: Look for any leaks or damage to the brake lines and hoses.
4. Test the ABS: Perform a test of the Anti-lock Braking System (ABS) to ensure it is functioning correctly.

2.4. What Steps Should I Take to Check the EPB System?

Checking the Electronic Parking Brake (EPB) system involves a few specific steps to diagnose potential issues:

1. Check for Error Messages: Use an OBD-II scanner to check for specific EPB-related error codes.
2. Test EPB Engagement: Try engaging and disengaging the EPB to see if it operates smoothly.
3. Inspect EPB Actuator: Examine the EPB actuator for any signs of damage or malfunction.
4. Check Wiring: Ensure all wiring connections to the EPB system are secure and free from corrosion.

2.5. What Is the Importance of Checking the ECU?

The Engine Control Unit (ECU) is the central computer in your Subaru, managing various systems including the engine, transmission, and braking. Checking the ECU is crucial because it stores error codes and provides valuable insights into potential issues. According to Bosch Automotive Handbook, the ECU’s performance directly impacts the vehicle’s overall functionality.

2.6. How Do I Verify Sensor Functionality?

Verifying sensor functionality requires specific tools and techniques:

1. Use a Multimeter: Test the voltage and resistance of sensors to ensure they are within specified ranges.
2. Live Data Readings: Use an OBD-II scanner to monitor live data readings from sensors while the engine is running.
3. Compare to Specifications: Compare the sensor readings to the manufacturer’s specifications to identify any discrepancies.
4. Consult a Professional: If unsure, consult a professional mechanic for accurate diagnosis.

2.7. What Role Does Wiring Play in This Issue?

Faulty wiring can cause numerous issues in modern vehicles. Damaged, corroded, or loose wiring can lead to short circuits, communication errors, and incorrect sensor readings, triggering warning lights. A thorough inspection of the wiring harnesses related to the engine, braking system, and EPB is essential to identify and rectify any wiring-related problems. Regular checks, as recommended by CAR-TOOL.EDU.VN, can help prevent these issues.

3. Potential Solutions: How Can I Fix the Problem?

Once you’ve diagnosed the problem, implementing the appropriate solutions is crucial. CAR-TOOL.EDU.VN provides a range of resources to help you fix the issues causing the check engine and brake lights to illuminate simultaneously in your Subaru, ensuring your vehicle returns to optimal performance.

3.1. When Should I Replace the Gas Cap?

The gas cap should be replaced if it is damaged, cracked, or no longer provides a tight seal. A faulty gas cap can cause evaporative emission leaks, triggering the check engine light. Regular replacement, typically every 50,000 miles or as recommended by the manufacturer, helps maintain the integrity of the fuel system. According to the EPA, a properly sealed gas cap is essential for reducing emissions.

3.2. What Are the Steps to Fix EPB Issues?

Fixing EPB issues involves several steps, depending on the nature of the problem:

1. Reset the EPB: Use an OBD-II scanner to reset the EPB system and clear any error codes.
2. Replace the EPB Actuator: If the actuator is faulty, replace it with a new one.
3. Check and Replace Wiring: Inspect and replace any damaged or corroded wiring.
4. Update Software: Ensure the EPB system software is up to date.
5. Professional Inspection: If the problem persists, seek professional assistance.

3.3. How Do I Address Common Brake System Problems?

Addressing common brake system problems includes:

1. Replace Worn Brake Pads: Replace brake pads when they are worn to the minimum thickness.
2. Top Up Brake Fluid: Ensure the brake fluid is at the correct level and bleed the system if necessary.
3. Repair Brake Lines: Repair or replace any damaged brake lines or hoses.
4. Fix ABS Issues: Address any issues with the ABS system, such as faulty sensors or modules.
5. Regular Maintenance: Perform regular brake system maintenance to prevent future problems.

3.4. What Can Be Done About ECU Malfunctions?

ECU malfunctions can be complex and often require professional intervention. Steps to address ECU issues include:

1. Reset the ECU: Try resetting the ECU to clear any stored error codes and restore normal operation.
2. Update Software: Ensure the ECU software is up to date to fix any known bugs or issues.
3. Replace the ECU: If the ECU is severely damaged or malfunctioning, it may need to be replaced.
4. Professional Diagnostics: Seek professional diagnostics to identify and address underlying causes of ECU malfunctions.

3.5. How Do I Replace Faulty Sensors?

Replacing faulty sensors involves:

1. Identify the Faulty Sensor: Use an OBD-II scanner to identify the specific sensor that is malfunctioning.
2. Locate the Sensor: Find the location of the sensor in the engine or braking system.
3. Disconnect and Remove: Disconnect the wiring and remove the faulty sensor.
4. Install the New Sensor: Install the new sensor and connect the wiring.
5. Test the System: Test the system to ensure the new sensor is functioning correctly.

3.6. When Is It Necessary to Flush the Transmission?

Flushing the transmission is necessary when there are signs of contamination or fluid degradation. This process helps remove debris and contaminants from the transmission system, improving its performance and longevity. According to Subaru TSB NUMBER: 16-80-11R, flushing the transmission and performing the dynamic check mode may correct issues related to valve body contamination.

3.7. What Are the Steps to Fix Wiring Issues?

Fixing wiring issues involves:

1. Inspect Wiring: Thoroughly inspect the wiring harnesses for any signs of damage or corrosion.
2. Repair Damaged Wires: Repair any damaged wires by splicing or replacing them.
3. Clean Corroded Connections: Clean any corroded wiring connections to ensure a good electrical contact.
4. Secure Wiring Harnesses: Ensure wiring harnesses are securely fastened to prevent future damage.
5. Professional Assistance: If you are not comfortable working with wiring, seek professional assistance.

4. Preventative Maintenance: How to Avoid Future Issues

Preventative maintenance is key to avoiding future issues with your Subaru. CAR-TOOL.EDU.VN provides comprehensive guides on maintaining your vehicle to ensure optimal performance and prevent warning lights from illuminating.

4.1. What Is the Recommended Maintenance Schedule for a Subaru?

The recommended maintenance schedule for a Subaru typically includes:

• Every 6 Months or 6,000 Miles: Oil and filter change, tire rotation, and inspection of fluid levels.
• Every 12 Months or 12,000 Miles: Brake inspection, coolant flush, and inspection of belts and hoses.
• Every 30,000 Miles: Transmission fluid change, spark plug replacement, and inspection of suspension components.
• Every 60,000 Miles: Timing belt replacement (if applicable), comprehensive inspection of all systems.

4.2. How Often Should I Check the Brake Fluid?

Brake fluid should be checked at least every month or during regular maintenance intervals. Ensuring the brake fluid is at the correct level and free from contamination is essential for proper brake system function. According to the National Institute for Automotive Service Excellence (ASE), contaminated or low brake fluid can significantly reduce braking performance.

4.3. What Are the Best Practices for Maintaining the EPB System?

Best practices for maintaining the EPB system include:

1. Regular Inspections: Inspect the EPB system for any signs of damage or malfunction.
2. Software Updates: Ensure the EPB system software is up to date.
3. Proper Usage: Use the EPB system correctly and avoid unnecessary strain on the system.
4. Professional Service: Seek professional service for any EPB-related issues.

4.4. How Important Is Regular Oil Changes?

Regular oil changes are crucial for maintaining engine health and preventing issues that can trigger the check engine light. Clean oil lubricates engine components, reduces friction, and helps dissipate heat. According to a study by the American Petroleum Institute (API), regular oil changes can significantly extend engine life and improve fuel efficiency.

4.5. What Role Do Tire Maintenance and Alignment Play?

Proper tire maintenance and alignment are essential for vehicle safety and performance. Maintaining correct tire pressure, rotating tires regularly, and ensuring proper wheel alignment can prevent uneven wear, improve handling, and reduce the risk of accidents. According to the Tire Industry Association (TIA), regular tire maintenance can also improve fuel efficiency and extend the life of your tires.

4.6. How Can I Prevent Wiring Issues?

Preventing wiring issues involves:

1. Regular Inspections: Inspect wiring harnesses for any signs of damage or corrosion.
2. Proper Protection: Protect wiring from exposure to extreme temperatures, moisture, and chemicals.
3. Secure Connections: Ensure all wiring connections are secure and free from corrosion.
4. Professional Installation: Have wiring work performed by a qualified technician.

4.7. What Is the Significance of Using Quality Parts?

Using quality parts is crucial for ensuring the reliability and longevity of your vehicle. Quality parts are designed to meet or exceed manufacturer specifications, providing better performance and durability. According to a study by the Automotive Aftermarket Industry Association (AAIA), using quality parts can reduce the risk of breakdowns and extend the life of your vehicle.

5. Understanding Subaru-Specific Issues

Subarus have unique characteristics, and understanding these can help diagnose and prevent specific issues. CAR-TOOL.EDU.VN offers resources tailored to Subaru vehicles, providing valuable insights into common problems and effective solutions.

5.1. Are There Common Problems Specific to Subaru Models?

Yes, certain problems are more common in Subaru models:

• Head Gasket Failures: Subaru engines are known for head gasket failures, which can lead to overheating and engine damage.
• Oil Consumption: Some Subaru models have issues with excessive oil consumption.
• CVT Transmission Issues: The Continuously Variable Transmission (CVT) in some Subarus can experience problems, such as slipping or shuddering.
• Wheel Bearing Failures: Subaru wheel bearings are prone to premature failure.

5.2. How Do Subaru’s Boxer Engines Affect Warning Lights?

Subaru’s Boxer engines, while providing a low center of gravity and balanced performance, can have specific issues that trigger warning lights. For example, oil leaks from the horizontally opposed cylinders can lead to low oil levels, activating the check engine light. Additionally, the unique design can sometimes make diagnosing issues more complex.

5.3. What Role Does Subaru’s Symmetrical All-Wheel Drive Play?

Subaru’s Symmetrical All-Wheel Drive (AWD) system enhances traction and handling, but it also requires specific maintenance to ensure proper function. Issues such as mismatched tire sizes or problems with the AWD system components can trigger warning lights. Regular maintenance, including tire rotations and inspections of the AWD system, is essential.

5.4. How Can I Properly Maintain a Subaru CVT Transmission?

Properly maintaining a Subaru CVT transmission involves:

1. Regular Fluid Changes: Change the CVT fluid according to the manufacturer’s recommendations.
2. Avoid Harsh Driving: Avoid harsh acceleration and deceleration, which can strain the CVT transmission.
3. Monitor Performance: Monitor the CVT transmission for any signs of slipping or shuddering.
4. Professional Service: Seek professional service for any CVT-related issues.

5.5. What Are the Best Practices for Subaru Head Gasket Maintenance?

Best practices for Subaru head gasket maintenance include:

1. Monitor Coolant Levels: Regularly check and maintain proper coolant levels.
2. Avoid Overheating: Avoid overheating the engine, which can stress the head gaskets.
3. Use Quality Coolant: Use high-quality coolant that meets Subaru’s specifications.
4. Regular Inspections: Have the head gaskets inspected during regular maintenance intervals.

5.6. How Do I Address Common Subaru Oil Consumption Issues?

Addressing common Subaru oil consumption issues involves:

1. Use High-Quality Oil: Use high-quality synthetic oil that meets Subaru’s specifications.
2. Check for Leaks: Regularly check for oil leaks and address them promptly.
3. Monitor Oil Levels: Monitor oil levels frequently and top off as needed.
4. Consider Repairs: Consider repairs such as replacing valve stem seals or piston rings if oil consumption is excessive.

5.7. What Are the Benefits of Using Subaru-Specific Parts?

Using Subaru-specific parts ensures compatibility and optimal performance for your vehicle. These parts are designed to meet Subaru’s specifications, providing better fit and durability. According to Subaru, using genuine parts can also help maintain your vehicle’s warranty and resale value.

6. Utilizing CAR-TOOL.EDU.VN for Your Subaru Needs

CAR-TOOL.EDU.VN provides a wealth of resources to help you maintain and repair your Subaru. From detailed guides to expert advice, our platform is designed to support both DIY enthusiasts and professional mechanics.

6.1. How Can CAR-TOOL.EDU.VN Help Me Diagnose Issues?

CAR-TOOL.EDU.VN offers detailed diagnostic guides, troubleshooting tips, and OBD-II code explanations to help you accurately diagnose issues with your Subaru. Our resources are designed to simplify the diagnostic process and provide actionable solutions.

6.2. What Resources Does CAR-TOOL.EDU.VN Offer for Preventative Maintenance?

CAR-TOOL.EDU.VN provides comprehensive maintenance schedules, step-by-step guides, and expert advice to help you keep your Subaru in top condition. Our resources cover all aspects of preventative maintenance, from oil changes to brake inspections.

6.3. How Can I Find Quality Parts on CAR-TOOL.EDU.VN?

CAR-TOOL.EDU.VN offers a curated selection of high-quality parts for your Subaru. Our platform provides detailed product descriptions, customer reviews, and compatibility information to help you find the right parts for your vehicle.

6.4. What Kind of Support Can I Get from CAR-TOOL.EDU.VN Experts?

CAR-TOOL.EDU.VN offers expert support through our online forums, Q&A sections, and direct consultations. Our team of experienced mechanics and automotive professionals is available to answer your questions and provide personalized advice.

6.5. How Does CAR-TOOL.EDU.VN Stay Updated with the Latest Subaru Information?

CAR-TOOL.EDU.VN stays updated with the latest Subaru information through continuous research, industry partnerships, and feedback from our community of users. We regularly update our resources to reflect the latest technical developments and best practices.

6.6. What Are the Benefits of Joining the CAR-TOOL.EDU.VN Community?

Joining the CAR-TOOL.EDU.VN community provides access to a network of fellow Subaru enthusiasts, expert advice, and exclusive resources. Our community is a valuable source of support and information for all your Subaru needs.

6.7. How Can CAR-TOOL.EDU.VN Help Me Save Money on Repairs?

CAR-TOOL.EDU.VN helps you save money on repairs by providing DIY guides, troubleshooting tips, and access to affordable parts. Our resources empower you to perform many repairs yourself, reducing the need for expensive professional services.

7. Real-World Examples: Case Studies

Examining real-world examples can provide valuable insights into diagnosing and resolving issues with your Subaru. CAR-TOOL.EDU.VN has compiled several case studies to illustrate common problems and effective solutions.

7.1. Case Study 1: EPB Failure in a 2015 Subaru Outback

A 2015 Subaru Outback owner experienced the simultaneous illumination of the check engine and brake lights. Diagnostic codes revealed an EPB failure. The technician replaced the faulty EPB actuator, reset the system, and verified proper function, resolving the issue.

7.2. Case Study 2: Brake System Issue in a 2018 Subaru Crosstrek

A 2018 Subaru Crosstrek owner noticed both the check engine and brake lights were on. Inspection revealed low brake fluid and worn brake pads. Replacing the brake pads and topping off the brake fluid resolved the issue.

7.3. Case Study 3: Sensor Failure in a 2016 Subaru Forester

A 2016 Subaru Forester owner reported the check engine and brake lights activating. Diagnostic codes indicated a faulty wheel speed sensor. Replacing the sensor and clearing the codes resolved the problem.

7.4. Case Study 4: Transmission Problem in a 2017 Subaru Impreza

A 2017 Subaru Impreza owner experienced the simultaneous illumination of the check engine and brake lights. Diagnostic codes pointed to a transmission issue. A transmission flush and fluid replacement, as recommended by Subaru TSB NUMBER: 16-80-11R, resolved the problem.

7.5. Case Study 5: Wiring Issue in a 2019 Subaru Ascent

A 2019 Subaru Ascent owner noticed the check engine and brake lights were on. Inspection revealed a damaged wiring harness. Repairing the damaged wires resolved the issue.

7.6. Case Study 6: Gas Cap Issue in a 2020 Subaru Legacy

A 2020 Subaru Legacy owner experienced the check engine light coming on, followed by the brake light. The issue was traced to a loose gas cap. Tightening the gas cap and clearing the codes resolved the problem.

7.7. Case Study 7: ECU Malfunction in a 2014 Subaru WRX

A 2014 Subaru WRX owner reported the check engine and brake lights activating. Diagnostic codes indicated an ECU malfunction. The ECU was replaced and reprogrammed, resolving the issue.

8. Expert Insights: Tips from Mechanics

Gaining insights from experienced mechanics can help you better understand and address issues with your Subaru. CAR-TOOL.EDU.VN has gathered tips from automotive professionals to provide valuable guidance.

8.1. What Are the Most Common Mistakes People Make When Diagnosing Warning Lights?

Common mistakes include:

• Ignoring the Lights: Delaying diagnosis can lead to more significant problems.
• Not Checking Error Codes: Failing to check error codes can lead to misdiagnosis.
• Replacing Parts Without Diagnosing: Replacing parts without proper diagnosis can be costly and ineffective.
• Ignoring Maintenance Schedules: Neglecting regular maintenance can lead to preventable issues.

8.2. What Tools Are Essential for Diagnosing Subaru Issues?

Essential tools include:

• OBD-II Scanner: For reading and clearing diagnostic codes.
• Multimeter: For testing sensor functionality.
• Brake Pad Thickness Gauge: For measuring brake pad wear.
• Torque Wrench: For tightening bolts to the correct specifications.
• Jack and Jack Stands: For safely lifting the vehicle.

8.3. How Can I Save Money on Subaru Repairs?

You can save money by:

• Performing DIY Repairs: Completing simple repairs yourself.
• Purchasing Parts Online: Buying parts online can often be cheaper than buying from a dealership.
• Following Maintenance Schedules: Regular maintenance can prevent costly repairs.
• Seeking Multiple Quotes: Getting multiple quotes from different mechanics.

8.4. What Are the Signs That a Problem Needs Immediate Attention?

Signs that a problem needs immediate attention include:

• Brake Light Flashing: Indicates a critical brake system issue.
• Unusual Noises: Strange sounds from the engine or braking system.
• Loss of Power: Significant loss of engine power.
• Overheating: Engine overheating.

8.5. How Can I Prevent Issues with Subaru’s AWD System?

Preventing issues with Subaru’s AWD system involves:

• Using Matching Tires: Ensuring all tires are the same size and type.
• Regular Tire Rotations: Rotating tires regularly to ensure even wear.
• Inspecting AWD Components: Inspecting the AWD system components during regular maintenance.
• Following Maintenance Schedules: Adhering to the manufacturer’s recommended maintenance schedules.

8.6. What Should I Do If I Suspect a Head Gasket Issue?

If you suspect a head gasket issue:

• Check for Coolant Leaks: Look for coolant leaks around the engine.
• Monitor Coolant Levels: Regularly monitor coolant levels.
• Check for Overheating: Watch for signs of engine overheating.
• Perform a Compression Test: Perform a compression test to check for cylinder pressure loss.

8.7. How Can I Ensure My Subaru Is Ready for Winter?

Ensuring your Subaru is ready for winter involves:

• Checking Tire Tread: Ensuring tires have adequate tread depth for winter conditions.
• Using Winter Tires: Using winter tires for improved traction.
• Checking Battery Health: Ensuring the battery is in good condition.
• Checking Coolant Levels: Ensuring coolant levels are adequate and the coolant is properly mixed.

9. FAQs: Addressing Common Concerns

Addressing common concerns can help you better understand and manage issues with your Subaru. CAR-TOOL.EDU.VN has compiled a list of frequently asked questions to provide clear and concise answers.

9.1. What Does It Mean When the Check Engine Light Is On?

The check engine light indicates a problem with the engine, emissions system, or related components. It is essential to check the error codes to diagnose the issue accurately.

9.2. Is It Safe to Drive with the Check Engine Light On?

It depends on the severity of the problem. If the light is flashing, it indicates a serious issue that requires immediate attention. If the light is solid, it is generally safe to drive to a repair shop, but it is best to have the issue diagnosed as soon as possible.

9.3. What Does the Brake Light Indicate?

The brake light indicates a problem with the braking system, such as low brake fluid, worn brake pads, or a malfunction in the ABS.

9.4. Can Low Brake Fluid Cause the Brake Light to Come On?

Yes, low brake fluid is a common cause of the brake light illuminating.

9.5. How Do I Reset the Check Engine Light?

You can reset the check engine light by using an OBD-II scanner to clear the error codes. However, the light will come back on if the underlying issue is not resolved.

9.6. How Often Should I Replace My Brake Pads?

Brake pads should be replaced when they are worn to the minimum thickness, typically around 3mm. The frequency of replacement depends on driving conditions and habits.

9.7. What Is the Difference Between the Check Engine Light and the Maintenance Required Light?

The check engine light indicates a problem with the engine or emissions system, while the maintenance required light is a reminder to perform routine maintenance, such as an oil change.

9.8. Can a Faulty Oxygen Sensor Cause the Check Engine Light to Come On?

Yes, a faulty oxygen sensor is a common cause of the check engine light illuminating.

9.9. How Do I Find a Reliable Mechanic for My Subaru?

You can find a reliable mechanic by asking for recommendations from friends and family, reading online reviews, and checking for certifications from organizations like ASE.

9.10. What Is the Best Way to Keep My Subaru Running Smoothly?

The best way to keep your Subaru running smoothly is to follow the manufacturer’s recommended maintenance schedule, address issues promptly, and use quality parts and fluids.

10. Taking Action: Contact CAR-TOOL.EDU.VN Today

Don’t let the check engine and brake lights on your Subaru cause unnecessary stress. Contact CAR-TOOL.EDU.VN today for expert advice, quality parts, and comprehensive support. Our team is ready to help you diagnose and resolve any issues, ensuring your Subaru runs smoothly and safely.

For immediate assistance, visit our website at CAR-TOOL.EDU.VN or contact us via WhatsApp at +1 (641) 206-8880. You can also visit our physical location at 456 Elm Street, Dallas, TX 75201, United States.

Take the first step towards resolving your Subaru’s issues. Contact CAR-TOOL.EDU.VN today!