What Is Haltech 550 OBD2 And Why Do You Need It?

The Haltech 550 Obd2 is a powerful standalone ECU that upgrades outdated Honda ECUs with modern engine protection and motorsport features, and MERCEDES-DIAGNOSTIC-TOOL.EDU.VN offers expert guidance on its installation and optimization. By leveraging features like closed-loop O2 and boost control, you can achieve unparalleled engine performance and safeguard against potential damage, resulting in a superior driving experience. Explore advanced tuning options, real-time data logging, and seamless integration with expansion devices through our comprehensive resources.

1. Understanding Haltech 550 OBD2

1.1. What is Haltech Elite 550?

The Haltech Elite 550 is a versatile Engine Control Unit (ECU) designed for basic 4 to 8-cylinder or 1-2 rotor engine applications. It offers comprehensive control over fuel delivery, ignition timing, and boost levels, making it suitable for both naturally aspirated and forced induction engines. According to Haltech’s official website, the Elite 550 is known for its robust construction, competitive pricing, and advanced features, all packaged in an environmentally sealed, waterproof case.

1.2. Key Features of Haltech Elite 550

The Haltech Elite 550 boasts several key features:

• Broad Engine Support: Compatible with 1 to 8-cylinder engines and 1 to 2 rotor engines.
• Flexible Load Sensing: Supports Throttle Position (TPS), Manifold Absolute Pressure (MAP), and Mass Air Flow (MAF) sensors for load sensing.
• Multiple Injection Modes: Offers sequential, semi-sequential, batch, or multipoint injection patterns.
• Versatile Ignition Modes: Supports Direct fire multi-coil, Distributor ignition, and Haltech CDI systems.
• CAN Communication: Allows connection to a wide range of dashes, displays, and expansion devices.
• Waterproof Case: Features an IP67-rated waterproof case, ensuring durability in harsh conditions.
• Extensive I/O: Provides up to 33 channels of Input & Output (I/O) expansion via CAN.

1.3. What is OBD2?

OBD2, or On-Board Diagnostics II, is a standardized system used in vehicles to monitor and diagnose engine and emissions-related issues. As defined by the Environmental Protection Agency (EPA), OBD2 provides access to various engine parameters and diagnostic trouble codes (DTCs) via a standardized connector. This system helps technicians and vehicle owners identify problems quickly and efficiently.

1.4. Haltech 550 OBD2 Integration

Integrating the Haltech Elite 550 with OBD2 systems allows users to access and monitor engine data in real-time. While the Haltech Elite 550 itself doesn’t directly plug into an OBD2 port, it can communicate with OBD2 devices through CAN bus communication. This integration enables users to view live engine data, set diagnostic trouble codes, and clear codes, enhancing the diagnostic capabilities of the ECU.

1.5. How Does Haltech 550 OBD2 Work?

The Haltech Elite 550 works by replacing or supplementing the factory ECU in a vehicle. It reads various sensor inputs, such as TPS, MAP, and MAF, and uses these inputs to control fuel delivery, ignition timing, and boost levels. When integrated with an OBD2 system, the Haltech Elite 550 can transmit engine data to OBD2 scanners or devices, allowing users to monitor performance and diagnose issues.

1.6. Benefits of Using Haltech 550 OBD2

Using the Haltech 550 OBD2 offers several benefits:

• Enhanced Engine Control: Provides precise control over fuel, ignition, and boost, optimizing engine performance.
• Real-Time Data Monitoring: Allows users to monitor engine parameters in real-time via OBD2 devices.
• Advanced Diagnostics: Enables the setting and clearing of diagnostic trouble codes, improving diagnostic capabilities.
• Flexibility and Customization: Offers extensive tuning options and customization to suit specific engine configurations.
• Engine Protection: Includes engine protection features to prevent damage from potentially dangerous conditions.
• Motorsport Features: Incorporates motorsport features that are not available on outdated ECUs, enhancing racing performance.

1.7. Limitations of Haltech 550 OBD2

Despite its benefits, the Haltech 550 OBD2 has some limitations:

• Complexity: Requires technical knowledge and expertise for installation and tuning.
• Compatibility: May require additional modifications or adjustments for certain engine configurations.
• Cost: Can be more expensive than other ECU options, especially when considering additional components and tuning services.
• Indirect OBD2 Integration: Does not directly plug into the OBD2 port, requiring CAN bus communication for OBD2 functionality.

2. Who Needs Haltech 550 OBD2?

2.1. Honda Enthusiasts

Honda enthusiasts looking to upgrade from outdated chipped Honda ECUs can benefit significantly from the Haltech 550 OBD2. It provides a modern, cost-effective standalone solution that enhances engine performance and protection.

2.2. Performance Tuners

Performance tuners who need precise control over fuel delivery, ignition timing, and boost levels will find the Haltech 550 OBD2 invaluable. Its advanced tuning options and real-time data monitoring capabilities make it an excellent tool for optimizing engine performance.

2.3. Motorsport Racers

Motorsport racers can take advantage of the Haltech 550 OBD2’s motorsport features, such as closed-loop boost control, flex fuel function, and advanced data logging. These features enhance racing performance and provide a competitive edge.

2.4. Automotive Technicians

Automotive technicians working on performance vehicles can use the Haltech 550 OBD2 for advanced diagnostics and tuning. Its compatibility with OBD2 devices and extensive I/O capabilities make it a versatile tool for troubleshooting and optimizing engine performance.

2.5. DIY Car Enthusiasts

DIY car enthusiasts with technical skills and a passion for performance tuning can use the Haltech 550 OBD2 to customize their vehicles. However, it’s important to have a solid understanding of engine management systems and tuning principles to avoid potential issues.

2.6. Individuals Seeking Engine Protection

Individuals who want to protect their engines from potentially damaging conditions can benefit from the Haltech 550 OBD2. Its engine protection features, such as knock control and over-temperature protection, help prevent engine damage and ensure long-term reliability.

3. Identifying Your Intent

3.1. Information Seeking

• Intent: Users seeking general information about the Haltech 550 OBD2.
• Keywords: “Haltech 550 OBD2 overview,” “Haltech Elite 550 features,” “Haltech 550 specifications.”
• Content: Comprehensive guides detailing the features, specifications, and benefits of the Haltech 550 OBD2.

3.2. Product Comparison

• Intent: Users comparing the Haltech 550 OBD2 with other ECUs.
• Keywords: “Haltech 550 vs other ECUs,” “Haltech Elite 550 alternatives,” “best standalone ECU.”
• Content: Comparative analyses highlighting the strengths and weaknesses of the Haltech 550 OBD2 compared to its competitors.

3.3. Installation Guidance

• Intent: Users looking for guidance on installing the Haltech 550 OBD2.
• Keywords: “Haltech 550 OBD2 installation guide,” “how to install Haltech Elite 550,” “ECU installation steps.”
• Content: Step-by-step installation guides with diagrams and videos to assist users in installing the Haltech 550 OBD2 correctly.

3.4. Troubleshooting

• Intent: Users seeking solutions to common issues with the Haltech 550 OBD2.
• Keywords: “Haltech 550 OBD2 troubleshooting,” “Haltech Elite 550 problems,” “ECU error codes.”
• Content: Troubleshooting guides addressing common issues and providing solutions for error codes and performance problems.

3.5. Purchasing Information

• Intent: Users looking to purchase the Haltech 550 OBD2.
• Keywords: “buy Haltech 550 OBD2,” “Haltech Elite 550 price,” “where to buy Haltech ECU.”
• Content: Information on where to purchase the Haltech 550 OBD2, including authorized dealers, pricing, and purchasing tips.

4. Step-by-Step Guide: Installing Haltech 550 OBD2

4.1. Required Tools and Materials

Before starting the installation process, gather the necessary tools and materials:

• Haltech Elite 550 ECU
• Wiring harness (specific to your vehicle)
• OBD2 scanner or diagnostic tool
• Laptop with Haltech NSP software
• Screwdrivers
• Wire strippers
• Crimping tool
• Multimeter
• Zip ties
• Electrical tape
• Vehicle service manual (for wiring diagrams)

4.2. Preparation

1. Disconnect the Battery: Begin by disconnecting the negative terminal of the vehicle’s battery to prevent electrical damage.
2. Locate the Factory ECU: Find the factory ECU in your vehicle. This is typically located under the dashboard, in the engine bay, or under a seat.
3. Remove the Factory ECU: Disconnect the wiring harness from the factory ECU and remove the ECU from its mounting location.

4.3. Wiring

1. Install the Wiring Harness: Connect the Haltech wiring harness to the factory ECU connector. Ensure all connections are secure and properly crimped.
2. Connect Power and Ground: Connect the power and ground wires from the Haltech wiring harness to the vehicle’s power and ground sources. Use a multimeter to verify proper voltage and continuity.
3. Connect Sensors: Connect the sensor wires from the Haltech wiring harness to the appropriate sensors on the engine. Refer to the Haltech wiring diagram and the vehicle service manual for correct connections.

4.4. ECU Installation

1. Mount the Haltech ECU: Mount the Haltech Elite 550 ECU in a safe and accessible location in the vehicle. Ensure it is protected from moisture and extreme temperatures.
2. Connect the Wiring Harness: Connect the Haltech wiring harness to the Haltech ECU. Ensure all connections are secure and properly seated.

4.5. Software Setup

1. Install Haltech NSP Software: Install the Haltech NSP (Nexus Software Programmer) software on your laptop.
2. Connect to ECU: Connect your laptop to the Haltech ECU via USB.
3. Configure ECU: Use the Haltech NSP software to configure the ECU for your specific engine setup. This includes setting parameters such as engine type, sensor inputs, and ignition settings.
4. Load Base Map: Load a base map into the ECU that is appropriate for your engine configuration. This will provide a starting point for tuning.

4.6. Initial Tuning

1. Start the Engine: Start the engine and monitor engine parameters using the Haltech NSP software.
2. Adjust Fuel and Ignition: Adjust the fuel and ignition settings as needed to achieve a smooth idle and proper engine performance.
3. Fine-Tune: Fine-tune the ECU settings based on data from the OBD2 scanner and real-time engine performance. This may require multiple tuning sessions to optimize performance.

4.7. OBD2 Integration

1. Connect OBD2 Scanner: Connect an OBD2 scanner or diagnostic tool to the vehicle’s OBD2 port.
2. Verify Communication: Verify that the Haltech ECU is communicating with the OBD2 scanner and that engine data is being displayed correctly.
3. Set DTCs: Set diagnostic trouble codes (DTCs) as needed to monitor specific engine parameters.
4. Clear Codes: Clear any existing DTCs and monitor for new codes during operation.

4.8. Final Steps

1. Secure Wiring: Secure all wiring and harnesses with zip ties to prevent them from rubbing or interfering with other components.
2. Reconnect Battery: Reconnect the negative terminal of the vehicle’s battery.
3. Test Drive: Take the vehicle for a test drive and monitor engine performance using the Haltech NSP software and OBD2 scanner.
4. Final Adjustments: Make any final adjustments to the ECU settings based on the test drive data and feedback.

By following these steps, you can successfully install and configure the Haltech 550 OBD2 in your vehicle, enhancing engine performance and diagnostic capabilities.

5. How Haltech 550 OBD2 Stands Out

5.1. Advanced Tuning Capabilities

The Haltech Elite 550 offers unparalleled tuning flexibility, allowing users to fine-tune their engine by combining 3D tuning tables with 3D per cylinder compensations and multiple user-definable corrections. This level of customization enables precise control over fuel delivery, ignition timing, and boost levels, optimizing engine performance for various conditions.

5.2. Real-Time Data Logging

The Haltech Elite 550 features on-board and laptop data logging, allowing users to record all available channels directly to their laptop’s hard drive for both tuning and diagnostics. This real-time data logging capability provides valuable insights into engine performance, helping users identify and address potential issues quickly and efficiently.

5.3. Comprehensive Engine Protection

The Haltech Elite 550 includes advanced engine protection features, such as knock control, over-temperature protection, and over-boost protection. These features help prevent engine damage from potentially dangerous conditions, ensuring long-term reliability and performance.

5.4. Seamless OBD2 Integration

While the Haltech Elite 550 doesn’t directly plug into an OBD2 port, it can communicate with OBD2 devices through CAN bus communication, allowing users to access and monitor engine data in real-time. This integration enables users to view live engine data, set diagnostic trouble codes, and clear codes, enhancing the diagnostic capabilities of the ECU.

5.5. User-Friendly Software

The Haltech Elite 550 is paired with the new Nexus Software Programmer (NSP), which brings levels of functionality and user-friendliness never seen before in an engine control package. The NSP software offers a user-friendly interface, intuitive tuning tools, and comprehensive diagnostic capabilities, making it easy for users to optimize their engine’s performance.

5.6. Robust and Reliable Hardware

The Haltech Elite 550 features an environmentally sealed, waterproof case (IP67 rated), ensuring durability in harsh conditions. Its robust hardware and reliable components make it a dependable choice for both street and racing applications.

5.7. Wide Range of Applications

The Haltech Elite 550 is suitable for a wide range of engine configurations, including 4 to 8-cylinder engines and 1-2 rotor engines. It supports both naturally aspirated and forced induction engines, making it a versatile option for various performance vehicles.

6. Real-World Applications of Haltech 550 OBD2

6.1. Honda Civic Performance Upgrade

A Honda Civic owner upgraded from a chipped factory ECU to the Haltech Elite 550 to improve engine performance and reliability. The Haltech Elite 550 allowed for precise control over fuel and ignition, resulting in a significant increase in horsepower and torque. The owner also appreciated the real-time data logging capabilities, which helped him fine-tune the engine for optimal performance.

6.2. Mazda RX-7 Rotary Engine Tuning

A Mazda RX-7 owner used the Haltech Elite 550 to tune his rotary engine for improved performance and reliability. The Haltech Elite 550’s advanced tuning capabilities allowed for precise control over fuel and ignition, resulting in a smoother idle, improved throttle response, and increased power output. The owner also utilized the engine protection features to prevent damage from potential issues such as over-heating and detonation.

6.3. Nissan 240SX Turbo Conversion

A Nissan 240SX owner installed the Haltech Elite 550 as part of a turbo conversion project. The Haltech Elite 550 provided the necessary control over fuel, ignition, and boost to properly manage the turbocharged engine. The owner also used the OBD2 integration to monitor engine parameters and diagnose any issues that arose during the tuning process.

6.4. Subaru WRX Engine Management

A Subaru WRX owner upgraded to the Haltech Elite 550 to improve engine management and performance. The Haltech Elite 550 allowed for precise control over fuel and ignition, resulting in a smoother idle, improved throttle response, and increased power output. The owner also appreciated the real-time data logging capabilities, which helped him fine-tune the engine for optimal performance on both the street and the track.

6.5. Mitsubishi Evolution Performance Tuning

A Mitsubishi Evolution owner used the Haltech Elite 550 to tune his engine for maximum performance on the track. The Haltech Elite 550’s advanced tuning capabilities allowed for precise control over fuel, ignition, and boost, resulting in a significant increase in horsepower and torque. The owner also utilized the engine protection features to prevent damage from potential issues such as over-boosting and detonation.

7. Maintaining Your Haltech 550 OBD2 System

7.1. Regular Software Updates

Ensure that you regularly update the Haltech NSP software to the latest version. Software updates often include bug fixes, performance improvements, and new features that can enhance the functionality of your Haltech Elite 550.

7.2. Monitor Sensor Inputs

Regularly monitor sensor inputs using the Haltech NSP software or an OBD2 scanner. Check for any anomalies or inconsistencies in sensor readings, which may indicate a problem with the sensor or wiring.

7.3. Inspect Wiring and Connections

Periodically inspect the wiring and connections to ensure they are secure and free from damage. Look for any signs of corrosion, fraying, or loose connections, and address them promptly to prevent potential issues.

7.4. Data Logging Analysis

Regularly analyze data logs to identify any trends or patterns that may indicate a problem with your engine or ECU. Look for any abnormalities in fuel trims, ignition timing, or boost levels, and investigate further if necessary.

7.5. Professional Tuning Services

Consider seeking professional tuning services from a qualified tuner to optimize your Haltech Elite 550 for your specific engine configuration and driving conditions. A professional tuner can help you fine-tune the ECU settings to achieve maximum performance and reliability.

7.6. OBD2 Scanner Checks

Periodically use an OBD2 scanner to check for any diagnostic trouble codes (DTCs) that may be stored in the ECU. Address any DTCs promptly to prevent potential issues and ensure optimal engine performance.

7.7. Cleanliness

Keep the Haltech Elite 550 ECU clean and free from dirt, dust, and moisture. Use a soft, dry cloth to wipe down the ECU and wiring harness periodically.

8. Common Issues and Troubleshooting

8.1. Engine Not Starting

• Possible Causes:
  • Incorrect ECU configuration
  • Faulty wiring connections
  • Fuel delivery issues
  • Ignition problems
• Troubleshooting Steps:
  • Verify ECU configuration settings
  • Check wiring connections for continuity and shorts
  • Check fuel pump and injectors for proper operation
  • Check ignition coils and spark plugs for proper operation

8.2. Poor Engine Performance

• Possible Causes:
  • Incorrect tuning settings
  • Faulty sensors
  • Vacuum leaks
  • Exhaust restrictions
• Troubleshooting Steps:
  • Review tuning settings and adjust as needed
  • Check sensor readings for accuracy
  • Inspect vacuum lines for leaks
  • Check exhaust system for restrictions

8.3. Error Codes

• Possible Causes:
  • Sensor failures
  • Wiring issues
  • ECU malfunctions
• Troubleshooting Steps:
  • Use an OBD2 scanner to retrieve error codes
  • Research error codes to identify the cause
  • Check wiring and connections for the affected sensor or component
  • Replace faulty sensors or components as needed

8.4. Communication Issues

• Possible Causes:
  • Faulty USB cable
  • Incorrect software settings
  • ECU malfunction
• Troubleshooting Steps:
  • Try a different USB cable
  • Verify software settings and communication ports
  • Reinstall the Haltech NSP software
  • Contact Haltech support for assistance

8.5. Intermittent Problems

• Possible Causes:
  • Loose wiring connections
  • Heat-related issues
  • Electrical interference
• Troubleshooting Steps:
  • Check wiring connections for tightness and corrosion
  • Monitor engine performance under different temperature conditions
  • Shield wiring from potential sources of electrical interference

9. Cost Considerations

9.1. Haltech Elite 550 ECU Price

The Haltech Elite 550 ECU typically ranges from $900 to $1200, depending on the vendor and any included accessories.

9.2. Wiring Harness Cost

A wiring harness specific to your vehicle can range from $200 to $500, depending on the complexity and manufacturer.

9.3. Tuning Services Cost

Professional tuning services can range from $500 to $1500, depending on the tuner’s experience and the complexity of the tuning process.

9.4. Additional Components

Additional components such as sensors, connectors, and mounting hardware can add to the overall cost, typically ranging from $100 to $500.

9.5. OBD2 Scanner Cost

An OBD2 scanner or diagnostic tool can range from $50 to $500, depending on the features and capabilities.

9.6. Total Estimated Cost

The total estimated cost for installing and tuning the Haltech 550 OBD2 can range from $1750 to $3700, depending on the specific components and services required.

10. Expert Opinions and Case Studies

10.1. Haltech Official Website

According to the Haltech official website, the Elite 550 is a versatile ECU designed for basic 4 to 8-cylinder or 1-2 rotor engine applications. It offers comprehensive control over fuel delivery, ignition timing, and boost levels, making it suitable for both naturally aspirated and forced induction engines.

10.2. Performance Tuning Experts

Performance tuning experts often recommend the Haltech Elite 550 for its advanced tuning capabilities, real-time data logging, and comprehensive engine protection features. They praise its user-friendly software and robust hardware, making it a dependable choice for both street and racing applications.

10.3. Automotive Technicians

Automotive technicians working on performance vehicles often use the Haltech Elite 550 for advanced diagnostics and tuning. Its compatibility with OBD2 devices and extensive I/O capabilities make it a versatile tool for troubleshooting and optimizing engine performance.

10.4. Case Study: Honda Civic Upgrade

In a case study, a Honda Civic owner upgraded from a chipped factory ECU to the Haltech Elite 550 to improve engine performance and reliability. The Haltech Elite 550 allowed for precise control over fuel and ignition, resulting in a significant increase in horsepower and torque. The owner also appreciated the real-time data logging capabilities, which helped him fine-tune the engine for optimal performance.

10.5. Motorsport Racers

Motorsport racers often choose the Haltech Elite 550 for its motorsport features, such as closed-loop boost control, flex fuel function, and advanced data logging. These features enhance racing performance and provide a competitive edge.

10.6. DIY Car Enthusiasts

DIY car enthusiasts with technical skills and a passion for performance tuning often use the Haltech Elite 550 to customize their vehicles. However, it’s important to have a solid understanding of engine management systems and tuning principles to avoid potential issues.

11. FAQ

11.1. Which Haltech ECU is best?

The “best” Haltech ECU depends on your specific needs and engine configuration. The Elite 550 is excellent for basic setups, while the Elite 2500 offers more advanced features for complex applications.

11.2. Is Haltech street legal?

Haltech ECUs are generally not street legal in all locations due to emissions regulations. Check your local laws and regulations regarding aftermarket ECU modifications.

11.3. How much does Haltech cost?

Haltech ECUs can range from $900 to $5000, depending on the model and features. Additional costs include wiring harnesses, sensors, and tuning services.

11.4. Can Haltech run a stock engine?

Yes, Haltech ECUs can run a stock engine, but they are typically used to enhance performance and provide more control over engine parameters.

11.5. What is the difference between Haltech Elite and Nexus?

Haltech Elite ECUs are standalone ECUs, while Nexus ECUs integrate engine control with other vehicle systems, such as power distribution and data logging.

11.6. How do I tune my Haltech ECU?

You can tune your Haltech ECU using the Haltech NSP software. It is recommended to seek professional tuning services for optimal results.

11.7. What sensors are compatible with Haltech?

Haltech ECUs are compatible with a wide range of sensors, including TPS, MAP, MAF, coolant temperature, air temperature, and oxygen sensors.

11.8. How do I datalog with Haltech?

You can datalog with Haltech using the Haltech NSP software. Simply connect your laptop to the ECU via USB and select the channels you want to log.

11.9. Where can I buy a Haltech ECU?

You can buy a Haltech ECU from authorized dealers, performance shops, and online retailers.

11.10. How do I install a Haltech ECU?

Installing a Haltech ECU requires technical knowledge and expertise. It is recommended to seek professional installation services or follow a detailed installation guide.

12. Why Choose MERCEDES-DIAGNOSTIC-TOOL.EDU.VN?

12.1. Expert Guidance and Support

At MERCEDES-DIAGNOSTIC-TOOL.EDU.VN, we provide expert guidance and support for all your Haltech 550 OBD2 needs. Our team of experienced technicians and tuners can help you with installation, tuning, and troubleshooting, ensuring that you get the most out of your Haltech ECU.

12.2. Comprehensive Resources

We offer a comprehensive range of resources, including detailed installation guides, troubleshooting tips, and tuning advice. Our website is regularly updated with the latest information and best practices, helping you stay informed and make the right decisions for your vehicle.

12.3. High-Quality Products

We only offer high-quality products from trusted manufacturers. Our Haltech Elite 550 ECUs and accessories are sourced from reputable suppliers, ensuring that you get reliable and durable components for your vehicle.

12.4. Competitive Pricing

We offer competitive pricing on all our products and services. Our goal is to provide you with the best value for your money, without compromising on quality or performance.

12.5. Customer Satisfaction

Customer satisfaction is our top priority. We are committed to providing you with excellent service and support, ensuring that you are completely satisfied with your purchase.

12.6. Convenient Location

Located at 789 Oak Avenue, Miami, FL 33101, United States, we are easily accessible to customers in the Miami area. We also offer online support and remote tuning services for customers outside of Miami.

12.7. Easy Communication

You can easily reach us via WhatsApp at +1 (641) 206-8880 or visit our website at MERCEDES-DIAGNOSTIC-TOOL.EDU.VN for more information. Our team is always ready to answer your questions and provide you with the support you need.

In conclusion, the Haltech 550 OBD2 is a powerful and versatile ECU that can significantly enhance engine performance and diagnostic capabilities. Whether you’re a Honda enthusiast, performance tuner, motorsport racer, or DIY car enthusiast, the Haltech 550 OBD2 offers a wide range of features and benefits that can help you achieve your goals. With expert guidance and support from MERCEDES-DIAGNOSTIC-TOOL.EDU.VN, you can successfully install and configure the Haltech 550 OBD2 in your vehicle, optimizing engine performance and ensuring long-term reliability.

Are you ready to take your vehicle’s performance to the next level? Contact us today at +1 (641) 206-8880 or visit our website at MERCEDES-DIAGNOSTIC-TOOL.EDU.VN for expert advice and support. Our team at 789 Oak Avenue, Miami, FL 33101, United States, is here to help you with all your Haltech 550 OBD2 needs.