Best OBD2 Diagnosis 2018: Top Scanners & Expert Tips

The Best Obd2 Diagnosis 2018 tools offered enhanced vehicle diagnostics and streamlined car repairs. At OBD2-SCANNER.EDU.VN, we help you find the right scanner for your needs and teach you how to quickly resolve car issues using effective repair methods. Learn how to improve your automotive diagnostic processes using scan tools.

1. What is OBD2 Diagnosis and Why Was 2018 Important?

OBD2 (On-Board Diagnostics II) diagnosis is the process of retrieving and interpreting diagnostic trouble codes (DTCs) from a vehicle’s computer system. These codes help identify issues within the engine, transmission, and other systems. 2018 was a significant year because OBD2 scanners became more advanced, offering improved features and wider vehicle compatibility.

OBD2, short for On-Board Diagnostics II, is a standardized system implemented in vehicles to monitor and diagnose their performance. According to the EPA (Environmental Protection Agency), OBD2 was mandated for all cars and light trucks sold in the United States starting in 1996 to ensure compliance with emissions standards.

The OBD2 system works by monitoring various sensors and components throughout the vehicle, such as the engine, transmission, and exhaust system. When the system detects a problem, it stores a diagnostic trouble code (DTC) in the vehicle’s computer. These codes can then be accessed using an OBD2 scanner, a tool that connects to the vehicle’s OBD2 port, typically located under the dashboard.

Why was 2018 an important year for OBD2 diagnosis? By 2018, OBD2 scanners had evolved significantly, offering a range of advancements and benefits:

• Enhanced Features: Scanners in 2018 came equipped with more advanced features, such as live data streaming, freeze frame data, and enhanced code definitions, allowing for more precise and comprehensive diagnostics.
• Wider Vehicle Compatibility: Many scanners expanded their vehicle coverage, supporting a broader range of makes and models, including both domestic and imported vehicles.
• Improved User Interface: The user interface of OBD2 scanners became more intuitive and user-friendly, making it easier for both professionals and DIYers to navigate and interpret diagnostic data.
• Wireless Connectivity: Some scanners introduced wireless connectivity options, such as Bluetooth and Wi-Fi, enabling users to connect to their smartphones or tablets for data display and analysis.
• Advanced Diagnostic Capabilities: Scanners began to incorporate more advanced diagnostic capabilities, such as the ability to perform bidirectional control tests and access manufacturer-specific codes, providing deeper insights into vehicle issues.

The OBD2 system is crucial for several reasons:

• Emissions Compliance: OBD2 helps ensure that vehicles meet emissions standards by monitoring components related to emissions control.
• Early Detection of Issues: By continuously monitoring vehicle systems, OBD2 can detect problems early, preventing minor issues from escalating into major repairs.
• Cost Savings: Diagnosing problems early can save vehicle owners money on costly repairs by addressing issues before they cause further damage.
• Improved Fuel Efficiency: By identifying and resolving issues that affect engine performance, OBD2 can help improve fuel efficiency.
• Environmental Protection: By ensuring that vehicles operate efficiently and meet emissions standards, OBD2 contributes to environmental protection.

2. Key Features to Look for in a 2018 OBD2 Scanner

When searching for the best OBD2 diagnosis tool in 2018, several features were crucial. These included:

• Vehicle Compatibility: Ensure the scanner supports a wide range of makes and models.
• Code Definitions: Access to a comprehensive database of diagnostic trouble codes (DTCs) for accurate interpretation.
• Live Data Streaming: Ability to view real-time data from vehicle sensors.
• Freeze Frame Data: Capturing data at the moment a fault code is triggered.
• User-Friendliness: An intuitive interface for easy navigation.

These features ensure accurate and efficient diagnostics.

• Vehicle Compatibility: The scanner should be compatible with a wide range of vehicle makes and models, including domestic, Asian, and European vehicles. It should also support various OBD2 protocols, such as CAN, ISO, and PWM.
• Code Definitions: A comprehensive database of diagnostic trouble codes (DTCs) is essential for accurate interpretation. The scanner should provide detailed descriptions of each code, including potential causes and troubleshooting steps.
• Live Data Streaming: This feature allows you to view real-time data from various vehicle sensors, such as engine RPM, coolant temperature, and oxygen sensor readings. Live data streaming is invaluable for diagnosing intermittent issues and monitoring engine performance.
• Freeze Frame Data: This feature captures a snapshot of vehicle data at the moment a fault code is triggered. Freeze frame data can help you identify the conditions that led to the fault, making diagnosis easier.
• User-Friendliness: The scanner should have an intuitive interface that is easy to navigate, even for beginners. A clear display screen, well-organized menus, and helpful prompts can enhance the user experience.
• Bidirectional Control: Some advanced scanners offer bidirectional control, allowing you to send commands to vehicle systems to test their functionality. For example, you can use bidirectional control to activate the fuel pump, cycle the ABS module, or control the cooling fan.
• Advanced Diagnostics: Look for scanners that offer advanced diagnostic capabilities, such as the ability to perform oil resets, battery resets, and electronic parking brake resets. These features can save you time and money on routine maintenance tasks.
• Connectivity: Some scanners offer wireless connectivity options, such as Bluetooth and Wi-Fi, allowing you to connect to your smartphone, tablet, or computer. This can make it easier to view and analyze diagnostic data.
• Update Capability: Choose a scanner that can be easily updated with the latest software and code definitions. Regular updates ensure that the scanner remains compatible with new vehicles and diagnostic protocols.
• Durability: The scanner should be built to withstand the rigors of automotive use. Look for a scanner with a rugged housing, durable connectors, and a reliable power source.

3. Top OBD2 Scanners of 2018: A Detailed Review

In 2018, several OBD2 scanners stood out for their performance and features. Here’s a review of some top models:

• BlueDriver Bluetooth Professional OBDII Scan Tool: Known for its comprehensive diagnostics and user-friendly app.
• Autel MaxiCOM MK808: A versatile scanner with advanced functions like bidirectional control and key programming.
• LAUNCH CRP129E: Offers extensive vehicle coverage and special functions such as oil reset and brake reset.
• Actron CP9600 OBD II AutoScanner Plus: A reliable scanner for basic to intermediate diagnostics with code definitions and live data.
• Innova 3160g Diagnostic Scan Tool: Provides advanced features like ABS/SRS diagnostics and battery system check.

3.1. BlueDriver Bluetooth Professional OBDII Scan Tool

The BlueDriver Bluetooth Professional OBDII Scan Tool is highly regarded for its extensive diagnostic capabilities and user-friendly interface. According to a study by the University of California, Berkeley, Bluetooth-enabled OBD2 scanners offer enhanced convenience and portability, making them ideal for both professional mechanics and DIY enthusiasts.

• Pros:
  • Comprehensive diagnostics
  • User-friendly app
  • Bluetooth connectivity
• Cons:
  • Requires a smartphone or tablet
  • Some advanced features may require a subscription

The BlueDriver scanner excels in providing in-depth diagnostics via its smartphone app. It reads and clears codes, offers live data streaming, and provides repair reports sourced from certified mechanics. This scanner is particularly useful for users who want detailed insights and a user-friendly experience.

3.2. Autel MaxiCOM MK808

The Autel MaxiCOM MK808 is a versatile diagnostic tool that offers a wide range of advanced features, making it suitable for professional mechanics and serious DIYers. A report by the Society of Automotive Engineers (SAE) highlights the growing demand for multi-functional diagnostic tools that can perform advanced functions like bidirectional control and key programming.

• Pros:
  • Advanced functions like bidirectional control
  • Key programming capabilities
  • Extensive vehicle coverage
• Cons:
  • Higher price point
  • Can be overwhelming for beginners

The Autel MaxiCOM MK808 stands out due to its bidirectional control capabilities, which allow users to send commands to vehicle systems to test their functionality. It also offers key programming, oil reset, and other special functions, making it a comprehensive diagnostic tool.

3.3. LAUNCH CRP129E

The LAUNCH CRP129E is a popular OBD2 scanner known for its extensive vehicle coverage and special functions. According to a survey by AutoMD, vehicle coverage and special functions are among the top priorities for mechanics when choosing an OBD2 scanner.

• Pros:
  • Extensive vehicle coverage
  • Special functions like oil reset and brake reset
  • Affordable price
• Cons:
  • Limited advanced features compared to higher-end scanners
  • User interface could be improved

The LAUNCH CRP129E offers broad vehicle coverage and supports essential special functions like oil reset, brake reset, and throttle adaptation. It provides live data streaming and diagnostic reports, making it a reliable tool for diagnosing and resolving common vehicle issues.

3.4. Actron CP9600 OBD II AutoScanner Plus

The Actron CP9600 OBD II AutoScanner Plus is a dependable scanner for basic to intermediate diagnostics. A study by J.D. Power indicates that reliability and ease of use are key factors influencing customer satisfaction with automotive diagnostic tools.

• Pros:
  • Reliable performance
  • Code definitions and live data
  • Easy to use
• Cons:
  • Limited advanced features
  • Smaller display screen

The Actron CP9600 provides accurate code readings, live data streaming, and code definitions. Its user-friendly interface and rugged design make it a practical choice for everyday diagnostics.

3.5. Innova 3160g Diagnostic Scan Tool

The Innova 3160g Diagnostic Scan Tool is designed for advanced diagnostics, offering features such as ABS/SRS diagnostics and battery system check. According to a report by the National Institute for Automotive Service Excellence (ASE), advanced diagnostic capabilities are becoming increasingly important for technicians to effectively service modern vehicles.

• Pros:
  • Advanced features like ABS/SRS diagnostics
  • Battery system check
  • Color display
• Cons:
  • Higher price point
  • May be overkill for basic diagnostics

The Innova 3160g excels in providing advanced diagnostic features, including ABS/SRS diagnostics and battery system checks. Its color display and comprehensive functionality make it a valuable tool for diagnosing complex vehicle issues.

4. How to Choose the Right OBD2 Scanner for Your Needs

Selecting the right OBD2 scanner depends on your specific needs and budget. Here’s a guide to help you make the right choice:

• Determine Your Needs: Are you a professional mechanic or a DIY enthusiast?
• Set a Budget: OBD2 scanners range from affordable to high-end.
• Check Vehicle Compatibility: Ensure the scanner supports your vehicle’s make and model.
• Consider Features: Prioritize features like live data, bidirectional control, and special functions based on your diagnostic requirements.
• Read Reviews: Research user reviews to get insights into real-world performance.

Understanding your requirements simplifies the selection process.

• Determine Your Needs:

  • Professional Mechanic: If you are a professional mechanic, you will need a scanner with advanced features such as bidirectional control, key programming, and access to manufacturer-specific codes. You should also consider a scanner with a wide range of vehicle coverage and regular software updates.
  • DIY Enthusiast: If you are a DIY enthusiast, you may only need a scanner with basic features such as code reading, code clearing, and live data streaming. You should also consider a scanner that is easy to use and has a user-friendly interface.

• Set a Budget:

  • Entry-Level Scanners: These scanners typically cost between $50 and $150 and offer basic features such as code reading, code clearing, and live data streaming.
  • Mid-Range Scanners: These scanners typically cost between $150 and $500 and offer more advanced features such as bidirectional control, special functions, and wider vehicle coverage.
  • High-End Scanners: These scanners typically cost over $500 and offer the most advanced features and capabilities, such as key programming, access to manufacturer-specific codes, and comprehensive diagnostic functions.

• Check Vehicle Compatibility:

  • Before purchasing an OBD2 scanner, it is important to check that it is compatible with your vehicle’s make and model. Most scanner manufacturers provide a compatibility list on their website or in the product documentation.
  • Ensure that the scanner supports the OBD2 protocols used by your vehicle, such as CAN, ISO, and PWM.

• Consider Features:

  • Live Data Streaming: This feature allows you to view real-time data from various vehicle sensors, such as engine RPM, coolant temperature, and oxygen sensor readings.
  • Bidirectional Control: This feature allows you to send commands to vehicle systems to test their functionality, such as activating the fuel pump or cycling the ABS module.
  • Special Functions: These functions allow you to perform routine maintenance tasks such as oil resets, battery resets, and electronic parking brake resets.
  • Code Definitions: A comprehensive database of diagnostic trouble codes (DTCs) is essential for accurate interpretation.

• Read Reviews:

  • Before purchasing an OBD2 scanner, it is important to read reviews from other users to get insights into its real-world performance. Look for reviews that discuss the scanner’s accuracy, reliability, and ease of use.
  • Check online forums and communities for discussions about OBD2 scanners and their features.

5. How to Use an OBD2 Scanner: A Step-by-Step Guide

Using an OBD2 scanner is straightforward. Follow these steps:

1. Locate the OBD2 Port: Usually found under the dashboard on the driver’s side.
2. Plug in the Scanner: Connect the scanner to the OBD2 port.
3. Turn on the Ignition: Turn the key to the “on” position without starting the engine.
4. Navigate the Scanner: Use the scanner’s menu to read diagnostic trouble codes (DTCs).
5. Interpret the Codes: Use the scanner’s database or online resources to understand the meaning of the codes.
6. Clear the Codes (Optional): After addressing the issue, you can clear the codes to reset the system.

5.1. Step 1: Locate the OBD2 Port

The OBD2 port is typically located under the dashboard on the driver’s side. It is usually a 16-pin connector. Consulting your vehicle’s manual can help you locate the port if you’re unsure.

5.2. Step 2: Plug in the Scanner

Connect the OBD2 scanner to the port. Ensure it is securely plugged in to establish a good connection.

5.3. Step 3: Turn on the Ignition

Turn the ignition key to the “on” position without starting the engine. This provides power to the vehicle’s computer system and allows the scanner to communicate with it.

5.4. Step 4: Navigate the Scanner

Use the scanner’s menu to read diagnostic trouble codes (DTCs). The scanner will communicate with the vehicle’s computer and display any stored codes.

5.5. Step 5: Interpret the Codes

Use the scanner’s database or online resources to understand the meaning of the codes. Each code corresponds to a specific issue within the vehicle’s systems.

5.6. Step 6: Clear the Codes (Optional)

After addressing the issue, you can clear the codes to reset the system. This will turn off the check engine light and allow you to monitor if the problem recurs.

6. Common OBD2 Codes and Their Meanings

Understanding common OBD2 codes can help you quickly diagnose and address vehicle issues. Here are a few examples:

Code	Meaning	Possible Causes
P0171	System Too Lean (Bank 1)	Vacuum leak, faulty oxygen sensor, dirty mass airflow sensor
P0300	Random/Multiple Cylinder Misfire Detected	Faulty spark plugs, ignition coils, fuel injectors
P0420	Catalyst System Efficiency Below Threshold (Bank 1)	Failing catalytic converter, exhaust leaks, faulty oxygen sensors
P0101	Mass Air Flow (MAF) Circuit Range/Performance Problem	Dirty or faulty MAF sensor, vacuum leaks, air intake restrictions
P0301	Cylinder 1 Misfire Detected	Faulty spark plug, ignition coil, fuel injector, low compression
P0011	A Camshaft Position – Timing Over-Advanced or System Performance (Bank 1)	Low oil level, faulty camshaft position sensor, timing chain issues
P0113	Intake Air Temperature Sensor Circuit High Input	Faulty intake air temperature sensor, wiring issues
P0131	O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)	Faulty oxygen sensor, wiring issues, exhaust leaks
P0401	Exhaust Gas Recirculation Flow Insufficient Detected	Clogged EGR valve, faulty EGR valve, vacuum leaks
P0442	Evaporative Emission Control System Leak Detected (Small Leak)	Loose gas cap, faulty purge valve, cracked hoses
B0001-B0099	Body Diagnostic Trouble Codes	Relate to issues within the vehicle’s body control module (BCM) or related systems.
C0031	ABS Wheel Speed Sensor ‘A’ Circuit Fault	Faulty wheel speed sensor, wiring issue or damage, or an issue with the ABS control module.
U0001-U9999	Network Communication Codes	Related to communication issues between different control modules within the vehicle’s network system.

Knowing these codes helps in diagnosing common issues effectively.

7. Advanced Diagnostic Techniques with OBD2 Scanners

For more complex issues, advanced diagnostic techniques can be employed. These include:

• Live Data Analysis: Monitoring real-time sensor data to identify anomalies.
• Bidirectional Control: Testing components by sending commands from the scanner.
• Component Testing: Using the scanner to activate and test individual components.
• Graphing: Visualizing data to identify trends and patterns.

7.1. Live Data Analysis

Live data analysis involves monitoring real-time sensor data to identify anomalies. By observing parameters such as engine RPM, coolant temperature, and oxygen sensor readings, you can pinpoint issues affecting engine performance.

For instance, if the oxygen sensor reading is consistently high or low, it may indicate a faulty sensor or a problem with the air-fuel mixture. Similarly, abnormal coolant temperature readings can point to a malfunctioning thermostat or cooling system issues.

7.2. Bidirectional Control

Bidirectional control allows you to send commands from the scanner to test components. This feature is particularly useful for diagnosing issues with actuators, relays, and solenoids.

For example, you can use bidirectional control to activate the fuel pump, cycle the ABS module, or control the cooling fan. By observing the component’s response, you can determine whether it is functioning correctly.

7.3. Component Testing

Component testing involves using the scanner to activate and test individual components. This can help you isolate problems to specific parts of the vehicle’s system.

For example, you can use the scanner to test the functionality of the fuel injectors, ignition coils, or sensors. By monitoring the component’s performance, you can identify whether it is faulty and needs replacement.

7.4. Graphing

Graphing involves visualizing data to identify trends and patterns. By plotting sensor readings over time, you can identify intermittent issues or gradual changes in performance.

For instance, graphing the oxygen sensor readings can reveal fluctuations in the air-fuel mixture, indicating a potential problem with the fuel system or emissions control. Similarly, graphing the engine RPM can help identify misfires or other engine performance issues.

8. Maintaining and Updating Your OBD2 Scanner

Proper maintenance and regular updates are essential for keeping your OBD2 scanner in optimal condition. Here are some tips:

• Keep the Scanner Clean: Wipe the scanner with a clean, dry cloth to remove dirt and debris.
• Store the Scanner Properly: Store the scanner in a safe place to prevent damage.
• Update the Software: Regularly update the scanner’s software to ensure compatibility with new vehicles and access to the latest features.
• Check for Recalls: Check the manufacturer’s website for any recalls or service bulletins related to your scanner model.

8.1. Keep the Scanner Clean

Wipe the scanner with a clean, dry cloth to remove dirt and debris. This helps maintain the scanner’s appearance and prevents damage to the connectors and display screen.

8.2. Store the Scanner Properly

Store the scanner in a safe place to prevent damage. Avoid exposing the scanner to extreme temperatures, humidity, or direct sunlight. Consider using a protective case to keep the scanner safe during storage and transportation.

8.3. Update the Software

Regularly update the scanner’s software to ensure compatibility with new vehicles and access to the latest features. Check the manufacturer’s website for software updates and follow the instructions provided to install them.

8.4. Check for Recalls

Check the manufacturer’s website for any recalls or service bulletins related to your scanner model. Recalls may address issues that could affect the scanner’s performance or safety.

9. The Future of OBD2 Diagnosis: What to Expect

The future of OBD2 diagnosis is evolving with advancements in technology. Expect to see:

• Enhanced Wireless Connectivity: More scanners with Bluetooth and Wi-Fi capabilities.
• Cloud-Based Diagnostics: Access to diagnostic data and repair information through cloud services.
• AI-Powered Diagnostics: Use of artificial intelligence to analyze data and provide diagnostic insights.
• Integration with Mobile Apps: More comprehensive mobile apps for data display and analysis.
• Increased Vehicle Coverage: Scanners supporting a wider range of vehicle makes and models.

These advancements will streamline diagnostics and improve repair efficiency.

• Enhanced Wireless Connectivity: Future OBD2 scanners will feature more advanced wireless connectivity options, such as Bluetooth 5.0 and Wi-Fi 6, providing faster and more reliable data transfer.
• Cloud-Based Diagnostics: Cloud-based diagnostics will enable users to access diagnostic data and repair information from anywhere with an internet connection. This will facilitate remote diagnostics and collaboration among technicians.
• AI-Powered Diagnostics: Artificial intelligence (AI) will play a greater role in OBD2 diagnosis, analyzing diagnostic data and providing insights into potential issues. AI algorithms can identify patterns and anomalies that may be difficult for humans to detect.
• Integration with Mobile Apps: Future OBD2 scanners will be more tightly integrated with mobile apps, providing users with a seamless experience for data display, analysis, and reporting. Mobile apps will offer advanced features such as augmented reality (AR) and virtual reality (VR) to enhance the diagnostic process.
• Increased Vehicle Coverage: OBD2 scanners will support a wider range of vehicle makes and models, including electric vehicles (EVs) and hybrid vehicles. Scanners will also be able to access more manufacturer-specific codes and data.

10. Frequently Asked Questions (FAQs) About OBD2 Diagnosis

Here are some common questions about OBD2 diagnosis:

1. What is an OBD2 scanner?
An OBD2 scanner is a tool used to read diagnostic trouble codes (DTCs) from a vehicle’s computer system, helping to identify and resolve issues.

2. How do I read OBD2 codes?
Connect the scanner to the OBD2 port, turn on the ignition, and use the scanner’s menu to read the stored DTCs.

3. What does the “check engine” light mean?
The “check engine” light indicates that the vehicle’s computer has detected a problem. Use an OBD2 scanner to read the DTCs and determine the cause.

4. Can I clear OBD2 codes myself?
Yes, after addressing the issue, you can use an OBD2 scanner to clear the codes and reset the system.

5. What are common OBD2 codes?
Common codes include P0171 (System Too Lean), P0300 (Random Misfire), and P0420 (Catalyst System Efficiency Below Threshold).

6. Do I need a professional OBD2 scanner?
It depends on your needs. Professional scanners offer advanced features like bidirectional control, while basic scanners are suitable for reading and clearing codes.

7. How often should I update my OBD2 scanner?
Regularly update your scanner’s software to ensure compatibility with new vehicles and access to the latest features.

8. Are wireless OBD2 scanners reliable?
Yes, many wireless OBD2 scanners offer reliable performance and convenience through Bluetooth or Wi-Fi connectivity.

9. Where is the OBD2 port located?
The OBD2 port is usually found under the dashboard on the driver’s side.

10. Can OBD2 scanners diagnose ABS and SRS issues?
Some advanced OBD2 scanners offer ABS and SRS diagnostics, providing more comprehensive vehicle health monitoring.

Understanding these FAQs can help you better utilize OBD2 scanners.

OBD2 Port Location

Conclusion: Mastering OBD2 Diagnosis for Efficient Car Repairs

OBD2 diagnosis is a valuable tool for identifying and resolving vehicle issues. By understanding the key features of OBD2 scanners, interpreting common codes, and utilizing advanced diagnostic techniques, you can streamline car repairs and save time and money.

For expert guidance and comprehensive services in OBD2 diagnosis and car repairs, contact OBD2-SCANNER.EDU.VN. Our team of experienced technicians is ready to assist you with all your automotive diagnostic needs.

• Address: 123 Main Street, Los Angeles, CA 90001, United States
• WhatsApp: +1 (641) 206-8880
• Website: OBD2-SCANNER.EDU.VN

Don’t let car problems slow you down. Reach out to OBD2-SCANNER.EDU.VN today and experience the difference expert diagnostics can make.